---
id: CVE-2026-56684
title: Valkey is a distributed key-value database
summary: >-
  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 de…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-416
published: '2026-08-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:05:53.723'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-56684'
references:
  - url: >-
      https://github.com/valkey-io/valkey/commit/7cd5bcb7575d750ec2de618db80da58680a10fe3
    label: security-advisories@github.com
  - url: 'https://github.com/valkey-io/valkey/pull/4234'
    label: security-advisories@github.com
  - url: 'https://github.com/valkey-io/valkey/releases/tag/7.2.14'
    label: security-advisories@github.com
  - url: 'https://github.com/valkey-io/valkey/releases/tag/8.0.10'
    label: security-advisories@github.com
  - url: 'https://github.com/valkey-io/valkey/releases/tag/8.1.9'
    label: security-advisories@github.com
  - url: 'https://github.com/valkey-io/valkey/releases/tag/9.0.5'
    label: security-advisories@github.com
  - url: 'https://github.com/valkey-io/valkey/releases/tag/9.1.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/valkey-io/valkey/security/advisories/GHSA-53mc-f3m3-99vh
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00888
epssPercentile: 0.57604
ingestedAt: '2026-09-18T20:51:25.628Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.