Vulnerability Description
Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's RESTORE command accepts a malformed RDB stream payload that assigns one Pending Entry List NACK to multiple consumers during stream consumer-group deserialization, causing a use-after-free when one consumer is deleted while another still references the shared NACK and potentially allowing remote code execution. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/valkey-io/valkey/commit/06bc7768fe609f2054e69ccedefe7628f5675
- https://github.com/valkey-io/valkey/commit/509cb3c74e8cbc9c0498ebe8b6c93dcd605e7
- https://github.com/valkey-io/valkey/commit/98465eaffe3f95524a5046318bfbc4bdb9798
- https://github.com/valkey-io/valkey/commit/e95911d4d65be8789fa3705f44d7ed1e65378
- https://github.com/valkey-io/valkey/commit/f8d2027e8d4df790ac04974bf606408c8ea62
- https://github.com/valkey-io/valkey/pull/4073
- https://github.com/valkey-io/valkey/releases/tag/7.2.14
- https://github.com/valkey-io/valkey/releases/tag/8.0.10
- https://github.com/valkey-io/valkey/releases/tag/8.1.9
- https://github.com/valkey-io/valkey/releases/tag/9.0.5
- https://github.com/valkey-io/valkey/releases/tag/9.1.1
- https://github.com/valkey-io/valkey/security/advisories/GHSA-mvcj-73cw-22m4
FAQ
What is CVE-2026-63639?
CVE-2026-63639 is a vulnerability with a CVSS score of 8.8 (HIGH). Valkey is a distributed key-value database. Prior to 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1, Valkey's RESTORE command accepts a malformed RDB stream payload that assigns one Pending Entry List NACK t...
How severe is CVE-2026-63639?
CVE-2026-63639 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-63639?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.