CVE-2026-56684CWE-416

CVE-2026-56684

High · published August 18, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
59.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00888 · 59.0th percentile
Weakness
CWE-416 · Use After Free
Published
2026-08-18T19:16Z
References (8)
https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3 · [email protected]https://github.com/valkey-io/valkey/pull/4234 · [email protected]https://github.com/valkey-io/valkey/releases/tag/7.2.14 · [email protected]https://github.com/valkey-io/valkey/releases/tag/8.0.10 · [email protected]https://github.com/valkey-io/valkey/releases/tag/8.1.9 · [email protected]https://github.com/valkey-io/valkey/releases/tag/9.0.5 · [email protected]https://github.com/valkey-io/valkey/releases/tag/9.1.1 · [email protected]https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh · [email protected]
EPSS history
Timeline
  • 18 AUG 14:19Z
    Valkey: TLS pending-data processing use-after-free may allow remote code execution
    cvelistv5