Redis Open-Source Edition minor version release notes - Tair (Redis® OSS-Compatible)

To enhance the user experience, Tair (Redis OSS-compatible) periodically releases minor versions to add features or fix known bugs. This topic describes the minor version updates for Redis Open-Source Edition. We recommend that you upgrade the minor version of your instance during off-peak hours.

Redis Open-Source Edition 7.0, 6.0, 5.0, and 4.0 are fully compatible with the corresponding Redis major versions and are backward compatible.

Important

This topic provides the minor version release notes for Redis Open-Source Edition instances. For the minor version release notes of Tair (Enterprise Edition) instances, such as memory-optimized, persistent memory, and disk-based instances, see Tair minor version release notes.

How to query or upgrade the minor version of an instance

You can view the current version of your instance in the console. For more information about the procedure and related notes, see Upgrade minor versions and proxy versions.

Important

The system automatically checks the minor version of the instance. If the Minor Version Upgrade button is not displayed or is unavailable, the instance is running the latest minor version.
Because release schedules vary by region, the minor version information displayed in the console is the most up-to-date.

Update level descriptions

LOW: General. Includes routine updates, such as the addition of new features.
MEDIUM: Recommended. Includes optimizations for existing features. This level also includes all updates from the LOW level.
HIGH: Important. Includes critical upgrades that affect stability or security, such as fixing a vulnerability or a bug. This level also includes all updates from the LOW and MEDIUM levels.

Note

The following tables list releases after January 1, 2025. For release records before this date, see Historical versions.

Redis Open-Source Edition Standard Series

Redis Open-Source Edition 7.0

Minor version	Update level	Release date	Type	Description
7.0.2.9	MEDIUM	2026-01-14	Feature optimization	Supports smooth primary/secondary switchover.
7.0.2.9	MEDIUM	2026-01-14	Bug fixes	Fixes an issue where high-traffic command statistics within Lua scripts were incorrect.
7.0.2.7	MEDIUM	2026-01-14	Feature optimization	Optimizes the primary/secondary switchover procedure for cluster architecture instances. Adds support for the CONFIG command family.
7.0.2.6	HIGH	2025-11-24	Feature optimization	Enhances stability.
7.0.2.5	LOW	2025-10-31	Feature optimization	The authentication system is compatible with the `auth account:password` format. Supports lightweight cluster messages to improve pub/sub performance in cluster mode. Supports redirection for blocking commands.
7.0.2.4	HIGH	2025-10-09	Feature optimization	Enhances the stability of primary/secondary redirection. Enhances the stability of cluster scaling.
7.0.2.4	HIGH	2025-10-09	Bug fixes	Fixes the CVE-2025-46817 security vulnerability. Fixes the CVE-2025-46818 security vulnerability. Fixes the CVE-2025-46819 security vulnerability. Fixes the CVE-2025-49844 security vulnerability.
7.0.1.19	LOW	2025-06-26	Feature optimization	Enhances stability.
7.0.1.18	HIGH	2025-06-23	Feature optimization	Optimizes the primary/secondary switchover procedure.
7.0.1.18	HIGH	2025-06-23	Bug fixes	Fixes the CVE-2025-27151 security vulnerability. Fixes the CVE-2025-32023 security vulnerability. Fixes the CVE-2025-48367 security vulnerability.
7.0.1.17	HIGH	2025-04-28	Feature optimization	Standard architecture instances support -REDIRECT redirection. The `SENTINEL masters` command (and `master`, `slaves`, `replicas`) is supported in Sentinel-compatible mode. Adds `cmd_slowlog_count` statistics.
7.0.1.17	HIGH	2025-04-28	Bug fixes	Fixes the CVE-2025-21605 security vulnerability. Fixes the CVE-2024-51741 security vulnerability. Fixes an issue where QPS statistics for individual commands were inaccurate. Fixes an issue where the source IP address of commands within Lua scripts was incorrectly recorded in the audit log.
7.0.1.16	MEDIUM	2025-01-16	Security hardening	Fixes the CVE-2024-46981 security vulnerability.

Redis Open-Source Edition 6.0

Minor version	Update level	Release date	Type	Description
6.0.2.27	MEDIUM	2026-01-14	Feature optimization	Optimizes the primary/secondary switchover procedure for cluster architecture instances.
6.0.2.25	HIGH	2025-10-31	Feature optimization	The authentication system is compatible with the `auth acc:pwd` format. Optimizes the traffic throttling algorithm. Optimizes the AOF rewrite method.
6.0.2.24	HIGH	2025-10-09	Bug fixes	Fixes the CVE-2025-46817 security vulnerability. Fixes the CVE-2025-46818 security vulnerability. Fixes the CVE-2025-46819 security vulnerability. Fixes the CVE-2025-49844 security vulnerability.
6.0.2.23	HIGH	2025-06-25	Bug fixes	Fixes the CVE-2025-32023 security vulnerability. Fixes the CVE-2025-48367 security vulnerability.
6.0.2.22	MEDIUM	2025-06-05	Feature optimization	Optimizes the primary/secondary switchover procedure.
6.0.2.22	MEDIUM	2025-06-05	Bug fixes	Fixes an issue where large key statistics were incorrect after a cluster scale-out.
6.0.2.21	HIGH	2025-04-28	Feature optimization	Allows the `READONLY` and `READWRITE` commands to be executed when an instance is in the Loading state. The `SENTINEL masters` command (and `master`, `slaves`, `replicas`) is supported in Sentinel-compatible mode.
6.0.2.21	HIGH	2025-04-28	Bug fixes	Fixes a data access issue that occurred during the scaling of cluster instances. This issue affects versions 0.2.16 to 0.2.18. Fixes the CVE-2025-21605 security vulnerability. Fixes an issue where some error messages were missing from Errorstats, primarily involving `-WRONGTYPE` errors.
6.0.2.18	HIGH	2025-01-16	Bug fixes	Fixes an issue where the SRANDMEMBER command could cause an infinite loop in an instance. Fixes the CVE-2024-46981 security vulnerability. Fixes an issue where QPS statistics for individual commands were inaccurate.

Redis Open-Source Edition 5.0

Note

Redis Open-Source Edition 5.0 instances support cloud-native and classic deployment modes. In the following table, the minor version numbers in parentheses indicate the versions for classic instances.

Minor version	Update level	Release date	Type	Description
5.5.2.27(5.2.27)	MEDIUM	2026-01-14	Feature optimization	Optimizes the primary/secondary switchover procedure for cluster architecture instances.
5.5.2.25(5.2.25)	HIGH	2025-10-31	Feature optimization	The authentication system is compatible with the `auth acc:pwd` format. Optimizes the traffic throttling algorithm. Optimizes the AOF rewrite method.
5.5.2.24(5.2.24)	HIGH	2025-10-09	Bug fixes	Fixes the CVE-2025-46817 security vulnerability. Fixes the CVE-2025-46818 security vulnerability. Fixes the CVE-2025-46819 security vulnerability. Fixes the CVE-2025-49844 security vulnerability.
5.5.2.23(5.2.23)	HIGH	2025-06-25	Bug fixes	Fixes the CVE-2025-32023 security vulnerability. Fixes the CVE-2025-48367 security vulnerability.
5.5.2.22(5.2.22)	MEDIUM	2025-06-05	Feature optimization	Optimizes the primary/secondary switchover procedure.
5.5.2.22(5.2.22)	MEDIUM	2025-06-05	Bug fixes	Fixes an issue where large key statistics were incorrect after a cluster scale-out.
5.5.2.21(5.2.21)	HIGH	2025-04-28	Feature optimization	Allows the `READONLY` and `READWRITE` commands to be executed when an instance is in the Loading state. The `SENTINEL masters` command (and `master`, `slaves`, `replicas`) is supported in Sentinel-compatible mode.
5.5.2.21(5.2.21)	HIGH	2025-04-28	Bug fixes	Fixes a data access issue that occurred during the scaling of cluster instances. This issue affects versions 5.2.17 to 5.2.18. Fixes the CVE-2025-21605 security vulnerability. Fixes an issue where some error messages were missing from Errorstats, primarily involving `-WRONGTYPE` errors.
5.5.2.18(5.2.18)	HIGH	2025-01-16	Bug fixes	Fixes an issue where the SRANDMEMBER command could cause an infinite loop in an instance. Fixes the CVE-2024-46981 security vulnerability. Fixes an issue where QPS statistics for individual commands were inaccurate.

Redis Open-Source Edition 4.0

Minor version	Update level	Release date	Type	Description
1.9.20	HIGH	2025-10-31	Feature optimization	Optimizes the traffic throttling algorithm.
1.9.19	HIGH	2025-10-09	Bug fixes	Fixes the CVE-2025-46817 security vulnerability. Fixes the CVE-2025-46818 security vulnerability. Fixes the CVE-2025-46819 security vulnerability. Fixes the CVE-2025-49844 security vulnerability.
1.9.18	HIGH	2025-01-16	Security hardening	Fixes the CVE-2024-46981 and CVE-2024-31449 security vulnerabilities.

Historical versions

The following tables provide the release records of minor versions before January 1, 2025.

Redis Open-Source Edition 7.0 historical release records

Minor version	Update level	Release date	Type	Description
7.0.1.15	LOW	2024-12-10	Feature optimization	In passwordless Sentinel mode, you can configure more passwordless commands using the #no_loose_sentinel-password-free-commands parameter. Optimizes the statistics for cumulative client traffic and commands.
7.0.1.15	LOW	2024-12-10	Bug fixes	Fixes an issue where the large key statistics threshold became invalid during cluster instance scaling. Enhances the stability of cluster instance scaling.
7.0.1.13	HIGH	2024-10-08	Security hardening	Fixes the CVE-2024-31228 security vulnerability. Fixes the CVE-2024-31227 security vulnerability. Fixes the CVE-2024-31449 security vulnerability. Enhances stability.
7.0.1.12	LOW	2024-08-12	Feature optimization	Supports passwordless configuration for Sentinel.
7.0.1.10	LOW	2024-07-23	Feature optimization	Supports EventBus event recording.
7.0.1.9	LOW	2024-06-25	Feature optimization	Optimizes the execution efficiency of Pub/Sub commands to prevent stuttering when many connections stop subscribing at the same time. Optimizes the client polling check policy to prevent memory statistics and garbage collection from failing for persistent connections.
7.0.1.8	LOW	2024-05-28	Feature optimization	Adds monitoring for connections in the WATCH or BLOCK state. Adds metrics for rehashing. Upgrades the real-time hot key statistics feature. The feature now supports displaying precise QPS and can track up to 50 hot keys at the same time.
7.0.1.8	LOW	2024-05-28	Bug fixes	Fixes an issue where QPS statistics were incorrect due to the use of shared objects. Shared objects are no longer used when real-time hot key statistics are enabled.
7.0.1.7	LOW	2024-04-24	Feature optimization	Updates to Redis community version 7.0.15. For more information, see Redis 7.0.15 release note.
7.0.1.6	MEDIUM	2024-03-14	Feature optimization	The INFO STATS command now returns statistics on disconnections caused by exceeding client input and output buffer limits: client_query_buffer_limit_disconnections client_output_buffer_limit_disconnections Adds a real-time large key statistics threshold, which is 2,000 by default. For example, a string is identified as a large key if its length exceeds 2,000 characters. A List, Set, or Hash is identified as a large key if it contains more than 2,000 elements.
7.0.1.6	MEDIUM	2024-03-14	Bug fixes	Fixes an issue where large key statistics for Stream data were incorrect.
7.0.1.5	LOW	2024-01-09	Feature optimization	Optimizes the efficiency of active expiration. Adds the pubsub_clients metric to the INFO CLIENTS command.
7.0.1.4	HIGH	2023-11-15	Feature optimization	Updates to Redis community version 7.0.14. For more information, see Redis 7.0.14 release note.
7.0.1.4	HIGH	2023-11-15	Security hardening	Fixes the CVE-2023-41056 security vulnerability. Fixes the CVE-2023-41053 security vulnerability.
7.0.1.3	LOW	2023-08-28	Feature optimization	Optimizes the instance scaling procedure. Cluster instances support multi-zone disaster recovery deployment.
7.0.1.2	HIGH	2023-08-01	New features	Cluster architecture instances in direct connection mode support TLS encryption. Cluster architecture instances in proxy mode support IP address pass-through. You can control this feature using the ptod_enabled parameter. The SPUBLISH command for cluster architecture instances supports broadcasting within shards.
7.0.1.2	HIGH	2023-08-01	Feature optimization	Updates to Redis community version 7.0.12. This update includes multiple performance optimizations and security fixes, such as fixes for the CVE-2022-24834 and CVE-2023-36824 security vulnerabilities. For more information, see Redis 7.0.12 release note.
7.0.1.1	LOW	2023-07-17	Feature optimization	Optimizes the primary/secondary switchover and restart procedures for cluster architecture instances.
7.0.1.0	LOW	2023-04-20	New features	Cluster architecture and read/write splitting architecture instances are available. Supports smooth scaling for cluster architecture instances. Periodically prints hot key information to the audit log for troubleshooting.
7.0.0.6	LOW	2023-01-31	New features	Supports Audit Logs. Supports Top Key Statistics. Supports Latency Insights.
7.0.0.5	LOW	2022-07-21	Feature optimization	Updates to Redis community version 7.0.4.
7.0.0.4	LOW	2022-06-20	Feature optimization	Updates to Redis community version 7.0.2.
7.0.0.3	LOW	2022-05-27	First release	First release of Redis Open-Source Edition 7.0 for disk-based instances. For more information, see Redis 7.0 release notes.

Redis Open-Source Edition 6.0 historical release records

Minor version	Update level	Release date	Type	Description
6.0.2.17	LOW	2024-12-10	Feature optimization	In passwordless Sentinel mode, you can configure more passwordless commands using the #no_loose_sentinel-password-free-commands parameter. Optimizes the statistics for cumulative client traffic and commands.
6.0.2.17	LOW	2024-12-10	Bug fixes	Fixes an issue where the large key statistics threshold became invalid during cluster instance scaling. Enhances the stability of cluster instance scaling.
6.0.2.15	HIGH	2024-10-08	Security hardening	Fixes the CVE-2024-31228 security vulnerability. Fixes the CVE-2024-31449 security vulnerability.
6.0.2.14	LOW	2024-08-12	Feature optimization	Supports passwordless configuration for Sentinel.
6.0.2.12	LOW	2024-07-23	Feature optimization	Optimizes the whitelist check logic when both the VPC passwordless access feature and the #no_loose_check-whitelist-always parameter are enabled. The Latency Insight feature supports Pipeline monitoring.
6.0.2.12	LOW	2024-07-23	Bug fixes	Fixes an issue where the execution duration of commands within Lua and MULTI was incorrectly calculated. This issue affects versions 6.0.2.8 to 6.0.2.11.
6.0.2.11	LOW	2024-06-25	Feature optimization	The execution efficiency of Pub/Sub commands is optimized to prevent stuttering that occurs when a large number of users unsubscribe from channels at the same time. The client polling mechanism is optimized to prevent a failure to promptly collect memory statistics and reclaim unused memory for long-lived connections. The method used by child processes to save Redis Database (RDB) files and append-only files (AOFs) to disks is optimized.
6.0.2.10	LOW	2024-05-28	Security hardening	Enhances stability.
6.0.2.9	LOW	2024-05-28	Feature optimization	Adds monitoring for connections in the WATCH or BLOCK state. Adds metrics for rehashing. Upgrades the real-time hot key statistics feature. The feature now supports displaying precise QPS and can track up to 50 hot keys at the same time.
6.0.2.9	LOW	2024-05-28	Bug fixes	Fixes an issue where QPS statistics were incorrect due to the use of shared objects. Shared objects are no longer used when real-time hot key statistics are enabled.
6.0.2.8	LOW	2024-04-24	Feature optimization	Updates to Redis community version 6.0.20. For more information, see Redis 6.0.20 release note.
6.0.2.7	LOW	2024-03-14	Feature optimization	The INFO STATS command now returns statistics on disconnections caused by exceeding client input and output buffer limits: client_query_buffer_limit_disconnections client_output_buffer_limit_disconnections Adds a real-time large key statistics threshold, which is 2,000 by default. For example, a string is identified as a large key if its length exceeds 2,000 characters. A List, Set, or Hash is identified as a large key if it contains more than 2,000 elements.
6.0.2.6	LOW	2024-01-09	Feature optimization	Optimizes the efficiency of active expiration. Adds the pubsub_clients metric to the INFO CLIENTS command. Optimizes the execution efficiency of the CLUSTER NODES and CLUSTER SLOTS commands.
6.0.2.5	LOW	2023-08-28	Feature optimization	Adds replication traffic statistics, which are displayed separately in INFO STATS.
6.0.2.4	HIGH	2023-08-21	Feature optimization	Cluster architecture instances in direct connection mode support TLS encryption.
6.0.2.4	HIGH	2023-08-21	Security hardening	Fixes the CVE-2022-24834 security vulnerability.
6.0.2.3	MEDIUM	2023-07-17	Security hardening	Optimizes the primary/secondary switchover and restart procedures for cluster architecture instances.
6.0.2.1	MEDIUM	2023-06-30	Security hardening	Enhances the stability of the cluster architecture.
6.0.2.0	HIGH	2023-04-24	Feature optimization	Periodically prints hot key information to the audit log for troubleshooting. The ptod_enabled parameter now controls both performance monitoring and slow query log features.
6.0.2.0	HIGH	2023-04-24	Security hardening	Fixes several bugs related to cluster architecture scaling in extreme scenarios.
6.0.1.24	LOW	2022-11-14	Security hardening	Enhances stability.
6.0.1.23	LOW	2022-09-20	Feature optimization	The audit log now records expiration and deletion events. The audit log no longer records non-write commands such as PING, AUTH, and SELECT.
6.0.1.22	LOW	2022-09-13	Feature optimization	Optimizes how cluster architecture instances are handled after the connection limit is reached.
6.0.1.21	LOW	2022-08-30	Feature optimization	Optimizes the startup procedure for cluster architecture instances.
6.0.1.20	LOW	2022-06-28	Feature optimization	Fixes an issue where commands such as ZUNIONSTORE and ZINTERSTORE returned an error in proxy mode for cluster instances.
6.0.1.19	LOW	2022-06-22	Feature optimization	Optimizes the latency statistics histogram. For more information, see Latency insight.
6.0.1.19	LOW	2022-06-22	Security hardening	Upgrades and optimizes the procedure for adding and removing nodes in a cluster architecture. For more information, see Adjust the number of shards in a cluster.
6.0.1.18	LOW	2022-05-17	Feature optimization	Deletes the Errorstats - Selected field from the return value of the INFO command.
6.0.1.17	LOW	2022-05-10	Feature optimization	Cluster architecture instances support the MOVE command.
6.0.1.16	MEDIUM	2022-04-25	Security hardening	Optimizes the procedure for adding and removing nodes in a cluster architecture and enhances stability.
6.0.1.15	LOW	2022-03-24	New features	Supports latency statistics histogram. For more information, see Latency insight. Supports returning Errorstats (Redis error statistics) information in the INFO command.
6.0.1.14	LOW	2022-02-21	Feature optimization	Supports the READONLY and READWRITE commands. For more information, see Command compatibility of Redis Open-Source Edition.
6.0.1.13	LOW	2022-01-14	Feature optimization	Adds the memory usage metric for DB metadata. Optimizes the real-time Top Key statistics feature.
6.0.1.12	HIGH	2021-10-26	Security hardening	Fixes an issue where excessive slow query logs were generated during cluster instance configuration changes and enhances stability.
6.0.1.11	HIGH	2021-10-13	Feature optimization	Enhances the autonomous capability of smooth slot migration when cluster configurations are changed. Optimizes the performance of commands such as CLUSTER NODES. Optimizes the whitelist feature.
6.0.1.10	HIGH	2021-09-06	Feature optimization	Enhances stability.
6.0.1.9	MEDIUM	2021-08-16	Feature optimization	Enhances the reliability of smooth slot migration and improves stability.
6.0.1.8	MEDIUM	2021-08-06	Feature optimization	Enhances stability.
6.0.1.7	MEDIUM	2021-08-06	Feature optimization	Enhances stability.
6.0.1.6	MEDIUM	2021-07-19	New features	Merges updates from community version 6.0.14. For more information, see Redis 6.0 release notes.
6.0.1.6	MEDIUM	2021-07-19	Feature optimization	Optimizes the procedure for deleting source slot data after data migration to enhance data reliability. Simplifies the incremental data synchronization procedure for slot data migration.
6.0.1.5	MEDIUM	2021-06-04	Feature optimization	Enhances stability.
6.0.1.4	MEDIUM	2021-05-27	Feature optimization	Enhances stability.
6.0.1.3	LOW	2021-05-18	New features	Supports real-time statistics for large keys.
6.0.1.2	MEDIUM	2021-05-07	Feature optimization	Enhances stability.
6.0.1.1	MEDIUM	2020-11-28	New features	Merges updates from community version 6.0.9. For more information, see Redis 6.0 release notes. Supports smooth slot migration. Supports obtaining a virtual IP address (VIP) over the public network to provide better support for clients that use the direct connection mode.
6.0.1.1	MEDIUM	2020-11-28	Feature optimization	Optimizes the instance health check feature to accelerate primary/secondary switchovers in scenarios with disk jitter.
6.0.0.5	HIGH	2020-08-21	Bug fixes	Fixes an issue where hot key statistics were inaccurate.
6.0.0.4	HIGH	2020-07-20	Bug fixes	Fixes an issue where some parameter settings were lost after a restart. Fixes an issue where the secondary database flag was incorrect in slow query logs for the replication link.
6.0.0.3	LOW	2020-06-11	New features	Merges updates from community version 6.0.5. For more information, see Redis 6.0 release notes. In the return value of the INFO command, the Replication section now displays role information, such as `role:master`. This ensures compatibility with Redisson client calls in some scenarios. Supports QPS statistics for read and write commands. For more information, see View performance monitoring data.
6.0.0.2	LOW	2020-06-02	New features	Merges updates from community version 6.0.4. For more information, see Redis 6.0 release notes.
6.0.0.1	LOW	2020-05-06	First release	The first minor version released, based on community version 6.0.1. For more information, see Redis 6.0 release notes.

Redis Open-Source Edition 5.0 historical release records

Minor version	Update level	Release date	Type	Description
5.5.2.17(5.2.17)	LOW	2024-12-10	Feature optimization	Optimizes the statistics for cumulative client traffic and commands.
5.5.2.17(5.2.17)	LOW	2024-12-10	Bug fixes	Fixes an issue where the large key statistics threshold became invalid during cluster instance scaling. Enhances the stability of cluster instance scaling.
5.5.2.15(5.2.15)	HIGH	2024-10-08	Security hardening	Fixes the CVE-2024-31228 security vulnerability. Fixes the CVE-2024-31449 security vulnerability.
5.5.2.13(5.2.13)	LOW	2024-08-21	Feature optimization	Compatible with authentication attempts using an incorrect password when VPC passwordless access is enabled.
5.5.2.12(5.2.12)	LOW	2024-07-23	Feature optimization	Optimizes the whitelist check logic when both the VPC passwordless access feature and the #no_loose_check-whitelist-always parameter are enabled. The Latency Insight feature supports Pipeline monitoring. Compatible with Redis Open-Source Edition 5.0.14.
5.5.2.12(5.2.12)	LOW	2024-07-23	Bug fixes	Fixes an issue where the execution duration of commands within Lua and MULTI was incorrectly calculated. This issue affects versions 5.2.8 to 5.2.11.
5.5.2.11(5.2.11)	LOW	2024-06-25	Feature optimization	The execution efficiency of Pub/Sub commands is optimized to prevent stuttering that occurs when a large number of users unsubscribe from channels at the same time. The client polling mechanism is optimized to prevent a failure to promptly collect memory statistics and reclaim unused memory for long-lived connections. The method used by child processes to save Redis Database (RDB) files and append-only files (AOFs) to disks is optimized.
5.5.2.10(5.2.10)	LOW	2024-05-28	Security hardening	Enhances stability.
5.5.2.9(5.2.9)	LOW	2024-05-28	Feature optimization	Adds monitoring for connections in the WATCH or BLOCK state. Adds metrics for rehashing. Upgrades the real-time hot key statistics feature. The feature now supports displaying precise QPS and can track up to 50 hot keys at the same time.
5.5.2.9(5.2.9)	LOW	2024-05-28	Bug fixes	Fixes an issue where QPS statistics were incorrect due to the use of shared objects. Shared objects are no longer used when real-time hot key statistics are enabled.
5.5.2.8(5.2.8)	LOW	2024-04-24	Security hardening	Enhances stability.
5.5.2.7(5.2.7)	LOW	2024-03-14	Feature optimization	The INFO STATS command now returns statistics on disconnections caused by exceeding client input and output buffer limits: client_query_buffer_limit_disconnections client_output_buffer_limit_disconnections Adds a real-time large key statistics threshold, which is 2,000 by default. For example, a string is identified as a large key if its length exceeds 2,000 characters. A List, Set, or Hash is identified as a large key if it contains more than 2,000 elements.
5.5.2.6(5.2.6)	LOW	2024-01-09	Feature optimization	Optimizes the efficiency of active expiration. Adds the pubsub_clients metric to the INFO CLIENTS command. Optimizes the execution efficiency of the CLUSTER NODES and CLUSTER SLOTS commands.
5.0.5.20(0.5.20)	HIGH	2025-01-16	Security hardening	Fixes the CVE-2024-46981 security vulnerability.
5.2.5	LOW	2023-08-28	Feature optimization	Adds replication traffic statistics, which are displayed separately in INFO STATS.
5.2.4	HIGH	2023-08-21	Feature optimization	Cluster architecture instances in direct connection mode support TLS encryption.
5.2.4	HIGH	2023-08-21	Security hardening	Fixes the CVE-2022-24834 security vulnerability.
5.2.2	MEDIUM	2023-07-17	Security hardening	Optimizes the primary/secondary switchover and restart procedures for cluster architecture instances.
5.2.1	MEDIUM	2023-06-30	Security hardening	Enhances the stability of the cluster architecture.
5.2.0	HIGH	2023-04-24	Feature optimization	Periodically prints hot key information to the audit log for troubleshooting. The ptod_enabled parameter now controls both performance monitoring and slow query log features.
5.2.0	HIGH	2023-04-24	Security hardening	Fixes several bugs related to cluster architecture scaling in extreme scenarios.
5.1.13	LOW	2022-11-14	Security hardening	Enhances stability.
5.1.12	LOW	2022-09-20	Feature optimization	The audit log now records expiration and deletion events. The audit log no longer records non-write commands such as PING, AUTH, and SELECT.
5.1.11	LOW	2022-09-06	Feature optimization	Optimizes how cluster architecture instances are handled after the connection limit is reached.
5.1.10	LOW	2022-08-23	Feature optimization	Optimizes the startup procedure for cluster architecture instances. Optimizes the latency statistics histogram.
5.1.9	LOW	2022-06-22	Feature optimization	Optimizes the latency statistics histogram. For more information, see Latency insight.
5.1.9	LOW	2022-06-22	Security hardening	Upgrades and optimizes the procedure for adding and removing nodes in a cluster architecture. For more information, see Adjust the number of shards in a cluster.
5.1.8	LOW	2022-05-17	Feature optimization	Deletes the Errorstats - Selected field from the return value of the INFO command.
5.1.7	LOW	2022-05-06	Feature optimization	Cluster architecture instances support the MOVE command.
5.1.6	MEDIUM	2022-04-25	Feature optimization	Optimizes the procedure for adding and removing nodes in a cluster architecture and enhances stability.
5.1.5	LOW	2022-04-13	Feature optimization	Enhances stability.
5.1.4	LOW	2022-03-24	New features	Supports latency statistics histogram. For more information, see Latency insight. Supports returning Errorstats (Redis error statistics) information in the INFO command.
5.1.3	LOW	2022-02-21	Feature optimization	Supports the READONLY and READWRITE commands. For more information, see Command compatibility of Redis Open-Source Edition.
5.1.1	LOW	2022-01-04	Feature optimization	Adds the memory usage metric for DB metadata.
5.0.9	LOW	2021-12-22	Feature optimization	Optimizes the real-time Top Key statistics feature.
5.0.8	LOW	2021-11-15	Feature optimization	Supports smooth scaling for cluster instances. Account names are case-sensitive.
0.5.19	HIGH	2023-08-15	Security hardening	Fixes the CVE-2022-24834 security vulnerability.
0.5.18	LOW	2022-08-23	Feature optimization	Optimizes the startup procedure for cluster architecture instances.
0.5.17	HIGH	2022-06-07	Security hardening	Enhances stability.
0.5.16	HIGH	2022-05-23	Security hardening	Improves the stability of configuration changes for cluster architecture instances after direct connection is enabled.
0.5.15	HIGH	2022-04-25	Security hardening	Fixes an issue where migrating large keys during configuration changes had a probability of failing for cluster architecture instances after direct connection is enabled.
0.5.14	LOW	2022-01-04	Feature optimization	Adds the memory usage metric for DB metadata.
0.5.12	LOW	2021-11-29	Feature optimization	Fixes an issue where cluster instances failed to restart in abnormal situations.
0.5.11	LOW	2021-11-24	Feature optimization	Fixes an issue where the real-time key analysis feature missed statistics for the Spop command.
0.5.10	HIGH	2021-10-26	Security hardening	Fixes an issue where excessive slow query logs were generated during cluster instance configuration changes and enhances stability.
0.5.9	HIGH	2021-10-15	Security hardening	Enhances stability.
0.5.8	MEDIUM	2021-10-13	Feature update	Enhances the autonomous capability of smooth slot migration when cluster configurations are changed.
0.5.7	LOW	2021-08-26	New features	Provides detailed QPS (Queries Per Second) statistics. It now supports statistics for read, write, and other operations.
0.5.6	HIGH	2021-08-16	Bug fixes	Enhances the reliability of smooth slot migration and improves stability.
0.5.5	HIGH	2021-08-05	Bug fixes	Fixes an issue where configuration changes had a probability of failing for cluster instances with direct connection enabled.
0.5.4	MEDIUM	2021-07-27	Feature update	Enhances stability.
0.5.3	MEDIUM	2021-07-21	Feature update	Optimizes the procedure for deleting source data after data migration to enhance data reliability. Simplifies the incremental data synchronization procedure for data migration.
0.5.2	HIGH	2021-04-26	Security hardening	Mainly resolves security vulnerabilities in the community Lua JIT.
0.5.2	HIGH	2021-04-26	New features	Optimizes the slot migration capability. Disk-based instances can achieve smooth scaling based on this optimization. Supports real-time statistics for large keys. Supports obtaining a virtual IP address (VIP) over the public network to provide better support for users who use direct connection addresses.
0.5.0	MEDIUM	2021-03-25	New features	Supports smooth slot migration.
0.5.0	MEDIUM	2021-03-25	Feature optimization	Enhances stability when handling many asynchronous client requests.
0.4.0	MEDIUM	2021-03-09	New features	Supports real-time statistics for large keys. Supports the CONFIG RESETSTAT command. When an `illegal address` error message is returned, Redis includes the current client's IP address in the error message. You can use this information to set the correct IP whitelist for the Redis instance. Figure 1. IP address prompt
0.4.0	MEDIUM	2021-03-09	Feature optimization	Optimizes the instance health check feature to accelerate primary/secondary switchovers in scenarios with disk jitter.
0.3.10	HIGH	2020-09-25	Bug fixes	Fixes an issue where the return value of the CLUSTER NODES command was not compliant with the open source protocol. Slots are now separated by spaces to prevent client parsing errors.
0.3.9	LOW	2020-07-20	New features	Supports the ECS security group feature. You can quickly grant permissions by attaching the security group of an ECS instance to a Redis instance, without manually entering the ECS instance's IP address. This improves O&M efficiency. For more information, see Configure a whitelist using an ECS security group.
0.3.8	HIGH	2020-07-14	Feature optimization	The CLIENT UNBLOCK subcommand is available.
0.3.8	HIGH	2020-07-14	Bug fixes	Fixes an issue where the expiration time was parsed incorrectly during slot migration. Corrects the latency flag in the audit log to prevent confusion between primary and secondary audit logs.
0.3.7	HIGH	2020-06-17	Bug fixes	Fixes an issue where the IP address returned in direct connection mode was unreachable.
0.3.6	LOW	2020-06-09	New features	In the return value of the INFO command, the Replication section now displays role information, such as `role:master`. This ensures compatibility with Redisson client calls in some scenarios.
0.3.5	LOW	2020-06-05	New features	Supports QPS statistics for read and write commands. For more information, see View performance monitoring data.
0.3.4	HIGH	2020-04-08	Bug fixes	Fixes a crash that could occur when a hot key was evicted. Fixes a crash caused by a Use-After-Free (UAF) error when the audit log was disabled.
0.3.1	HIGH	2020-02-20	New features	Supports the audit log feature, which provides log query, online analysis, and export capabilities. For more information, see Audit Log. Supports direct connection mode. Clients can bypass the proxy using a direct connection address. This connection method is similar to connecting to a native Redis cluster, which reduces link overhead and further improves the response speed of the Redis service. For more information, see Enable direct connection. Supports requesting a public endpoint when passwordless access from a VPC is enabled. Adds a statistical scenario for `oom_err_count` in the INFO command. The count is incremented when the data volume exceeds the specified maxmemory value.
0.3.1	HIGH	2020-02-20	Bug fixes	Fixes a crash caused by the expiration mechanism being triggered when the source and destination of the RPOPLPUSH command were the same. Fixes a permission authentication error in VPC passwordless mode.
0.2.0	LOW	2020-01-17	New features	Supports real-time hot key statistics to help you quickly identify hot keys in your instance. For more information, see Top Key statistics.
0.1.2	LOW	2019-11-26	New features	Supports executing read-only Lua scripts on read-only nodes of read/write splitting instances.
Before 0.1.2	N/A	N/A	N/A	Early minor versions of version 5.0. Upgrade to the latest minor version.

Redis Open-Source Edition 4.0 historical release records

Minor version	Update level	Release date	Type	Description
1.9.17	LOW	2023-11-25	Security hardening	Enhances stability.
1.9.16	LOW	2023-08-15	Security hardening	Enhances stability.
1.9.15	LOW	2023-05-17	Feature optimization	Allows you to view the number of connections from proxy nodes to data nodes for cluster architecture instances in the CloudMonitor console.
1.9.14	LOW	2022-11-14	Feature optimization	Optimizes statistics information.
1.9.13	LOW	2022-08-23	Feature optimization	Optimizes the startup procedure for cluster architecture instances.
1.9.12	HIGH	2022-06-07	Security hardening	Enhances stability.
1.9.10	HIGH	2022-05-23	Security hardening	Improves the stability of configuration changes for cluster architecture instances after direct connection is enabled.
1.9.9	HIGH	2022-04-25	Security hardening	Enhances stability.
1.9.8	HIGH	2022-04-25	Security hardening	Fixes an issue where migrating large keys during configuration changes had a probability of failing for cluster architecture instances after direct connection is enabled.
1.9.6	HIGH	2021-10-15	Security hardening	Enhances stability.
1.9.5	LOW	2021-09-13	New features	Provides detailed QPS (Queries Per Second) statistics. It now supports statistics for read, write, and other operations.
1.9.4	HIGH	2021-08-05	Bug fixes	Fixes an issue where configuration changes had a probability of failing for cluster instances with direct connection enabled.
1.9.3	MEDIUM	2021-07-20	Feature update	Enhances stability.
1.9.2	HIGH	2021-04-19	Security hardening	Mainly resolves security vulnerabilities in the community Lua JIT.
1.9.2	HIGH	2021-04-19	New features	Supports obtaining a virtual IP address (VIP) over the public network to provide better support for users who use direct connection addresses.
1.9.1	MEDIUM	2021-03-08	Feature optimization	Optimizes the instance health check feature to accelerate primary/secondary switchovers in scenarios with disk jitter. Optimizes the ability of large-memory instances to execute BGSAVE and REWRITE using fork to prevent potential long pauses.
1.9.0	LOW	2021-02-22	New features	When an `illegal address` error message is returned, Redis includes the current client's IP address in the error message. You can use this information to set the correct IP whitelist for the Redis instance. Figure 2. IP address prompt
1.8.8	HIGH	2020-09-25	Bug fixes	Fixes an issue where the return value of the CLUSTER NODES command was not compliant with the open source protocol. Slots are now separated by spaces to prevent client parsing errors.
1.8.7	LOW	2020-07-20	New features	Supports the ECS security group feature. You can quickly grant permissions by attaching the security group of an ECS instance to a Redis instance, without manually entering the ECS instance's IP address. This improves O&M efficiency. For more information, see Configure a whitelist using an ECS security group.
1.8.6	HIGH	2020-07-14	Bug fixes	Corrects the latency flag in the audit log to prevent confusion between primary and secondary audit logs.
1.8.5	LOW	2020-06-09	New features	In the return value of the INFO command, the Replication section now displays role information, such as `role:master`. This ensures compatibility with Redisson client calls in some scenarios.
1.8.4	LOW	2020-06-05	New features	Supports QPS statistics for read and write commands. For more information, see View performance monitoring data.
1.8.3	HIGH	2020-04-08	Bug fixes	Fixes a crash that could occur when a hot key was evicted. Fixes a crash caused by a Use-After-Free (UAF) error when the audit log was disabled.
1.8.1	LOW	2020-02-20	New features	Supports requesting a public endpoint when passwordless access from a VPC is enabled.
1.8.0	HIGH	2020-01-16	New features	Supports real-time hot key statistics to help you quickly identify hot keys in your instance. For more information, see Top Key statistics.
1.8.0	HIGH	2020-01-16	Bug fixes	Fixes an issue in the direct connection scenario where the return value of the INFO command now includes cluster_enabled information. This allows some SDKs to correctly negotiate to cluster mode.
1.7.1	MEDIUM	2019-11-20	New features	Supports executing read-only Lua scripts on read-only nodes of read/write splitting instances. Supports direct connection mode. Clients can bypass the proxy using a direct connection address. This connection method is similar to connecting to a native Redis cluster, which reduces link overhead and further improves the response speed of the Redis service. For more information, see Enable direct connection. In the return value of the INFO command, the Memory section now includes statistics on Lua script memory usage.
1.7.1	MEDIUM	2019-11-20	Feature optimization	Optimizes memory usage for the audit log.
1.5.8	HIGH	2019-09-23	Bug fixes	Fixes an issue where the atomicity of SETEX was broken during two-way synchronization in older Global Distributed Cache links.
1.5.6	HIGH	2019-08-28	New features	The audit log supports recording latency events.
1.5.6	HIGH	2019-08-28	Bug fixes	Fixes an issue where slow requests caused by commands such as KEYS, FLUSHALL, and FLUSHDB from the client could trigger a primary/secondary switchover.
1.5.4	LOW	2019-07-08	New features	Supports the audit log feature, which provides log query, online analysis, and export capabilities. For more information, see Audit Log. Supports latency recording for the entire event loop to help you understand the engine status.
1.5.2	HIGH	2019-07-04	Bug fixes	Fixes a crash caused by the expiration mechanism being triggered when the source and destination of the RPOPLPUSH command were the same.
1.4.0	HIGH	2019-05-15	Bug fixes	Fixes an issue where a primary/secondary switchover was triggered when an instance entered the RDB or AOF loading state after a restart.
Before 1.4.0	N/A	N/A	N/A	Early minor versions of version 4.0. Upgrade to the latest minor version.

References

For the release notes of Proxy nodes, see Proxy minor version release notes.
For the release notes of Tair (Enterprise Edition), see Tair minor version release notes.