CVE-2026-101773 Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Group Replication Plugin).

High 7.1 Published 20 Oct 2026 Updated 22 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-101773?

CVE-2026-101773 is a high-severity vulnerability in Oracle Mysql Cluster, published on 20 Oct 2026.

Official description

Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Group Replication Plugin). Supported versions that are affected are MySQL Server: 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1; MySQL Cluster: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3 and 26.7.0-26.7.1. Easily exploitable vulnerability allows unauthenticated attacker with access to the physical communication segment attached to the hardware where the MySQL Server, MySQL Cluster executes to compromise MySQL Server, MySQL Cluster. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server, MySQL Cluster as well as unauthorized update, insert or delete access to some of MySQL Server, MySQL Cluster accessible data. CVSS 3.1 Base Score 7.1 (Integrity and Availability impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H).

Weakness: CWE-284

Which versions are affected by CVE-2026-101773?

It affects 2 products.

Products include Oracle Mysql Cluster, Oracle Mysql Server.

How do I fix CVE-2026-101773?

No fix has been published for CVE-2026-101773 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-101773 being exploited?

There is no known exploitation of CVE-2026-101773 in the wild and no public exploit code.

All Oracle Mysql Cluster vulnerabilities

Sources

Also known as GHSA-h4x2-6gc6-7w2p, UBUNTU-CVE-2026-101773.