CVE WatchJul 15, 2026

CVE-2026-21863

Valkey is a distributed key-value database. Prior to versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12, a malicious actor with access to the Valkey c

CVSS

7.5

High

EPSS

0.6%

p42

KEV

—

Exploit Today

0-100

Published: Feb 23, 2026 · Last modified: Jul 15, 2026 · CWE-125

EPSS · 30d

0.6%EPSS · 30 days0.6%

2026-06-302026-07-17

Technical description

Valkey is a distributed key-value database. Prior to versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12, a malicious actor with access to the Valkey clusterbus port can send an invalid packet that may cause an out bound read, which might result in the system crashing. The Valkey clusterbus packet processing code does not validate that a clusterbus ping extension packet is located within buffer of the clusterbus packet before attempting to read it. Versions 9.0.2, 8.1.6, 8.0.7, and 7.2.12 fix the issue. As an additional mitigation, don't expose the cluster bus connection directly to end users, and protect the connection with its own network ACLs.

Official references

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