Improper input validation in MySQL Cluster - CVE-2026-101781

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Main Vulnerability Database Vulnerabilities #VU163939

Improper input validation in MySQL Cluster - CVE-2026-101781

Published: November 10, 2026


Vulnerability identifier: #VU163939
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-101781
CWE-ID: CWE-125
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The vulnerability exists due to improper input validation within the Server: Group Replication GCS component in MySQL Cluster. A remote non-authenticated attacker can exploit this vulnerability to execute arbitrary code.


Affected software

MySQL Cluster
MySQL Server
Ubuntu
mysql-server-8.0 (Ubuntu package)
mysql-server (Ubuntu package)

How to mitigate CVE-2026-101781

Install updates from vendor's website.

mysql-server-8.0 (Ubuntu package) - addressed in versions 8.0.46-0ubuntu0.22.04.5, 8.0.46-0ubuntu0.24.04.5
mysql-server (Ubuntu package) - addressed in versions 8.4.13-0ubuntu0.26.04.2, 9.7.4-0ubuntu0.26.10.1

External References

Related Security Bulletins