Vulnerability record · CVE-2026-56684 · published 18 August 2026

CVE-2026-56684: Use after free vulnerability

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 tlsProcessPendingData function iterates pending_list while an authenticated client can trigger CLIENT KILL, causing connTLSClose to delete the iterator's cached next node and producing a use-after-free that can crash the server or potentially allow remote code execution when TLS is enabled. This issue is fixed in versions 7.2.14, 8.0.10, 8.1.9, 9.0.5, and 9.1.1.

7.5 CVSS 3.1 High EPSS 0.89% · top 42.3% CWE-416 · Use after free Awaiting Analysis

7.5CVSS 3.1 base score

0.89%EPSS exploitation probability, 30 days

NoNot in CISA KEV

0Affected product versions listed by NVD

8References

18 Sep 2026Last modified by NVD

Description

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

References

Link	Tags
https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3
https://github.com/valkey-io/valkey/pull/4234
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-53mc-f3m3-99vh

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-56684), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.