CVE-2026-56684
Valkey: TLS pending-data processing use-after-free may allow remote code execution
CVSS Score
7.5
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 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.
| CWE | CWE-416 |
| Vendor | valkey-io |
| Product | valkey |
| Published | Aug 18, 2026 |
| Last Updated | Aug 18, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
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
github.com: https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh github.com: https://github.com/valkey-io/valkey/pull/4234 github.com: https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3 github.com: https://github.com/valkey-io/valkey/releases/tag/7.2.14 github.com: https://github.com/valkey-io/valkey/releases/tag/8.0.10 github.com: https://github.com/valkey-io/valkey/releases/tag/8.1.9 github.com: https://github.com/valkey-io/valkey/releases/tag/9.0.5 github.com: https://github.com/valkey-io/valkey/releases/tag/9.1.1