CVE-2026-46863 Denial of service in MySQL Cluster

High 7.5 Published 16 Jun 2026 Updated 17 Jun 2026

Unauthenticated attackers can cause a complete denial of service in MySQL Server and Cluster 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-2026-46863?

CVE-2026-46863 is a high-severity denial of service vulnerability in Oracle Mysql Cluster, 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 Server, MySQL Cluster product of Oracle MySQL (component: Server: Connection Handling). Supported versions that are affected are MySQL Server: 8.4.0-8.4.9, 9.0.0-9.7.0; MySQL Cluster: 8.0.11-8.0.46, 8.4.0-8.4.9 and 9.0.0-9.7.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols 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 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-2026-46863?

It affects 2 products.

Products include Oracle Mysql Cluster, Oracle Mysql Server.

How do I fix CVE-2026-46863?

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-2026-46863 being exploited?

There is no known exploitation of CVE-2026-46863 in the wild and no public exploit code.

All Oracle Mysql Cluster vulnerabilities

Sources

Also known as GHSA-g4xv-4vff-3g76, MINI-25mw-r323-wcgc, MINI-3vwp-4c2j-gc2w, MINI-69gh-hpxv-frgf, MINI-6j2r-x32c-f9fv, MINI-g7xc-qmq8-pw4c and 9 more.