Live › vulnerability › CVE-2026-101799
Go to dashboardA flaw in the Group Replication GCS component of MySQL Server and MySQL Cluster lets an unauthenticated attacker on the same network segment hang or repeatedly crash the server. The impact is denial of service only, with no data read or code execution stated.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 21:57 UTC. All times on this page are UTC.
Teams running MySQL Server or MySQL Cluster on the affected versions with Group Replication, where the GCS traffic travels over a network segment an attacker can reach. The sources describe an attacker with access to the physical communication segment, so hosts on isolated networks with no shared segment are lower risk. Standalone servers without Group Replication are not clearly in scope.
No product ranges from the sources yet.
SELECT @@version; in the MySQL client and compare against the affected ranges: 8.0.0-8.0.49, 8.4.0-8.4.12, 9.7.0-9.7.3, 26.7.0-26.7.1.SELECT * FROM performance_schema.replication_group_members;8.4.12, 9.7.x to a release after 9.7.3, or 26.7.x to a release after 26.7.1.8.0.49.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Vulnerability in the MySQL Server, MySQL Cluster product of Oracle MySQL (component: Server: Group Replication GCS). 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. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
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