CVE-2026-63639

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 3.1

8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS

1.2% chance of exploitation in the next 30 days; higher than 67% of CVEs (scores of 2026-10-25)

CWE

CWE-416

Published

2026-08-18

Modified

2026-10-22

Record from

the NVD, synced 2026-10-23

References

• https://github.com/valkey-io/valkey/commit/06bc7768fe609f2054e69ccedefe7628f5675da9
• https://github.com/valkey-io/valkey/commit/509cb3c74e8cbc9c0498ebe8b6c93dcd605e7271
• https://github.com/valkey-io/valkey/commit/98465eaffe3f95524a5046318bfbc4bdb9798291
• https://github.com/valkey-io/valkey/commit/e95911d4d65be8789fa3705f44d7ed1e65378445
• https://github.com/valkey-io/valkey/commit/f8d2027e8d4df790ac04974bf606408c8ea62778

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