CVE-2026-46862 Denial of service in MySQL Router

High 7.5 Published 16 Jun 2026 Updated 17 Jun 2026

Unauthenticated attackers can cause a complete denial of service in MySQL Router via network access.

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

What is CVE-2026-46862?

CVE-2026-46862 is a high-severity denial of service vulnerability in Oracle Corporation MySQL Router, published on 16 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Vulnerability in the MySQL Router product of Oracle MySQL (component: Router: General). Supported versions that are affected are 8.4.0-8.4.9 and 9.0.0-9.7.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via TLS to compromise MySQL Router. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of MySQL Router. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Weakness: CWE-400

Which versions are affected by CVE-2026-46862?

It affects 1 product.

Products include Oracle Mysql Router.

How do I fix CVE-2026-46862?

Upgrade to a fixed version.

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-2026-46862 being exploited?

There is no known exploitation of CVE-2026-46862 in the wild and no public exploit code.

Sources

Also known as GHSA-658f-6m2q-8572, UBUNTU-CVE-2026-46862.