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).

An update of the mysql package has been released.

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-8457-1 advisory.

    It was discovered that MySQL Router incorrectly handled repeated TLS protocol upgrade requests. An     unauthenticated remote attacker could possibly use this issue to cause MySQL Router to crash, resulting in     a denial of service. (CVE-2026-46862)

    It was discovered that MySQL Server incorrectly handled connection authentication. An unauthenticated     remote attacker could possibly use this issue to cause MySQL to crash, resulting in a denial of service.
    (CVE-2026-46863)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-46862)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
334061	Photon OS 5.0: Mysql PHSA-2026-5.0-0937	Nessus	PhotonOS Local Security Checks	Local	high
334048	Photon OS 5.0: Mysql PHSA-2026-5.0-92-0940	Nessus	PhotonOS Local Security Checks	Local	high
332605	Photon OS 5.0: Mysql PHSA-2026-5.0-90-0937	Nessus	PhotonOS Local Security Checks	Local	high
327558	Photon OS 4.0: Mysql PHSA-2026-4.0-1058	Nessus	PhotonOS Local Security Checks	Local	high
322263	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : MySQL vulnerabilities (USN-8457-1)	Nessus	Ubuntu Local Security Checks	Local	high
321825	Linux Distros Unpatched Vulnerability : CVE-2026-46862	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-46862

high

Tenable Plugins

high

high

high

high

high

high