CVE-2026-23631
Medium
Description
Redis is an in-memory data structure store. In all versions of redis-server with Lua scripting, an authenticated attacker can exploit the master-replica synchronization mechanism to trigger a use-after-free on replicas where replica-read-only is disabled or can be disabled, which may lead to remote code execution. A workaround is to prevent users from executing Lua scripts or avoid using replicas where replica-read-only is disabled. This is patched in version 8.6.3.
SeverityMedium
CVSS6.1
Exploit probability88. percentile3.1%
Product
Redis
PublishedMay 5, 2026
First seenMay 5, 2026
Weakness typeCWE-416Use after free
How to fix
Update
- redis redis8.6.3 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| redis redis | v < 8.6.3 | 8.6.3 |
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