Buffer overflow in Redis
CVE-2026-25243
Redis is an in-memory data structure store. In versions of redis-server up to 8.6.3, the RESTORE command does not properly validate serialized values. An authenticated attacker with permission to execute RESTORE can supply a crafted serial…
Vulnerability class: Buffer Overflow
EPSS: 0.001 (26.2th 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 < 8.6.3
Weakness classification (CWE)
References
- https://github.com/redis/redis/releases/tag/8.6.3 (x_refsource_MISC, Release Notes)
- https://github.com/redis/redis/security/advisories/GHSA-c8h9-259x-jff4 (x_refsource_CONFIRM, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-25243?
- CVE-2026-25243 is a high-severity vulnerability in Redis, classified under Heap-based Buffer Overflow. CVSS score: 8.8/10. Published 2026-05-05.
- How severe is CVE-2026-25243?
- High severity. CVSS v3 base score is 8.8 out of 10.