MySQL Srv GRP Plugin Vulnerability (pre 8.0.45, 8.4.8, 9.6.0)
CVE-2026-34270 Published on April 21, 2026
Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Group Replication Plugin). Supported versions that are affected are 8.0.0-8.0.45, 8.4.0-8.4.8 and 9.0.0-9.6.0. Easily exploitable vulnerability allows low privileged attacker with network access via multiple protocols to compromise MySQL Server. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Server. CVSS 3.1 Base Score 6.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Vulnerability Analysis
CVE-2026-34270 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is a Resource Exhaustion Vulnerability?
The software does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.
CVE-2026-34270 has been classified to as a Resource Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-34270
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Affected Versions
Oracle Corporation MySQL Server:- Version 8.0.0, <= 8.0.45 is affected.
- Version 8.4.0, <= 8.4.8 is affected.
- Version 9.0.0, <= 9.6.0 is affected.