CVE-2026-23631
Medium
Elevated severity or exploit probability.
CVSS base
8.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
EPSS — probability of exploitation (30 days)
2.8%
85.9th percentile
CISA KEV
Not listed
Weakness / dates
CWE-416
Published 2026-05-05 · modified 2026-07-25
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.
Affected
References
- https://github.com/redis/redis/releases/tag/8.6.3
- https://github.com/redis/redis/security/advisories/GHSA-8ghh-qpmp-7826
- https://access.redhat.com/errata/RHSA-2026:14316
- https://access.redhat.com/errata/RHSA-2026:25216
- https://access.redhat.com/errata/RHSA-2026:25219
- https://access.redhat.com/errata/RHSA-2026:25925
- https://access.redhat.com/errata/RHSA-2026:26306
- https://access.redhat.com/errata/RHSA-2026:26540
- https://access.redhat.com/errata/RHSA-2026:33444
- https://access.redhat.com/security/cve/CVE-2026-23631
- https://bugzilla.redhat.com/show_bug.cgi?id=2466788
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23631.json