Use After Free in Redis
CVE-2026-23479
Redis is an in-memory data structure store. In redis-server from 7.2.0 until 8.6.3, the unblock client flow does not handle an error return from `processCommandAndResetClient` when re-executing a blocked command. If a blocked client is evi…
Vulnerability class: Use-After-Free
EPSS: 0.001 (27.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Redis — versions >= 7.2.0, < 8.6.3
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/redis/redis/security/advisories/GHSA-93m2-935m-8rj3 (x_refsource_CONFIRM, Vendor Advisory)
- https://github.com/redis/redis/releases/tag/8.6.3 (x_refsource_MISC, Release Notes)
Frequently asked questions
- What is CVE-2026-23479?
- CVE-2026-23479 is a high-severity vulnerability in Redis, classified under Use After Free. CVSS score: 8.8/10. Published 2026-05-05.
- How severe is CVE-2026-23479?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2026-23479 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.