CVE-2026-56684 PUBLISHED

Valkey: TLS pending-data processing use-after-free may allow remote code execution

Assigner: GitHub_M
Reserved: 22.06.2026 Published: 18.08.2026 Updated: 19.08.2026

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.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS Score: 7.5

Attack Vector	Network	Scope	Unchanged
Attack Complexity	High	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	valkey-io
Product	valkey
Versions	Version < 7.2.14 is affected Version >= 8.0.0, < 8.0.10 is affected Version >= 8.1.0, < 8.1.9 is affected Version >= 9.0.0, < 9.0.5 is affected Version >= 9.1.0, < 9.1.1 is affected

References

Problem Types

CWE-416: Use After Free CWE