CVE-2026-35239 Denial of service in MySQL Server

Medium 4.9 Published 21 Apr 2026 Updated 22 Apr 2026

A high-privileged attacker can cause a complete denial of service in MySQL Server via network access.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2026-35239?

CVE-2026-35239 is a medium-severity denial of service vulnerability in Oracle Mysql Server, published on 21 Apr 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: DML). 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 high 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 4.9 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-284

Which versions are affected by CVE-2026-35239?

It affects 1 product.

Products include Oracle Mysql Server.

How do I fix CVE-2026-35239?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2026-35239 being exploited?

There is no known exploitation of CVE-2026-35239 in the wild and no public exploit code.

All Oracle Mysql Server vulnerabilities

Sources

Also known as AZL-83118, GHSA-9v46-qvxf-wrwq, MINI-8pr8-v5v5-v5gv, MINI-c7hv-xw54-6v4h, MINI-f26f-h7vq-jf5f, MINI-f38r-r47g-c877 and 3 more.