CVE-2026-63639

HIGH 8.8

Valkey: UAF in stream deserialization may lead to remote code execution

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-416
Vendor	valkey-io
Product	valkey
Published	Aug 18, 2026

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CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

valkey-io / valkey

< 7.2.14 >= 8.0.0, < 8.0.10 >= 8.1.0, < 8.1.9 >= 9.0.0, < 9.0.5 >= 9.1.0, < 9.1.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗