Use-After-Free Vulnerability in Redis Affects In-Memory Data Structure Store
CVE-2026-23631

6.1MEDIUM

Key Information:

Vendor

Redis

Status
Redis
Vendor
CVE Published:
5 May 2026

What is CVE-2026-23631?

An authenticated attacker can exploit a use-after-free vulnerability in the master-replica synchronization mechanism of Redis, specifically when Lua scripting is enabled and replica-read-only is disabled. This exploit can potentially lead to remote code execution on affected replicas. To mitigate the risk, it is recommended to restrict script execution and avoid using replicas without read-only access. This issue has been addressed in the Redis version 8.6.3.

Affected Version(s)

redis < 8.6.3

References

https://github.com/redis/redis/security/advisories/GHSA-8...
x_refsource_CONFIRM
https://github.com/redis/redis/releases/tag/8.6.3
x_refsource_MISC

CVSS V4

Score:
6.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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