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).

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-280245e2ea advisory.

    **MySQL 8.4.10**

        Release notes:
          https://dev.mysql.com/doc/relnotes/mysql/8.4/en/news-8-4-10.html         Upstream changelog:
          https://dev.mysql.com/doc/relnotes/mysql/8.4/en/

        Oracle Critical Security Patch Update - June 2026:
          https://www.oracle.com/security-alerts/cspujun2026.html#AppendixMSQL

        CVE-2026-46863 (CVSS 7.5) - Server: Connection Handling           The only CVE from the June 2026 CPU affecting the 'mysql8.4' package.
          Remotely exploitable without authentication (DoS).

          The remaining 7 CVEs affect MySQL Shell (VS Code extension),           MySQL Router, and NDB Cluster Operator  none of which are built           or shipped by this package.

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

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

The remote Fedora 44 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-8c7f5e32c5 advisory.

    **MySQL 8.4.10**

        Release notes:
          https://dev.mysql.com/doc/relnotes/mysql/8.4/en/news-8-4-10.html         Upstream changelog:
          https://dev.mysql.com/doc/relnotes/mysql/8.4/en/

        Oracle Critical Security Patch Update - June 2026:
          https://www.oracle.com/security-alerts/cspujun2026.html#AppendixMSQL

        CVE-2026-46863 (CVSS 7.5) - Server: Connection Handling           The only CVE from the June 2026 CPU affecting the 'mysql8.4' package.
          Remotely exploitable without authentication (DoS).

          The remaining 7 CVEs affect MySQL Shell (VS Code extension),           MySQL Router, and NDB Cluster Operator  none of which are built           or shipped by this package.

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

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

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 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. (CVE-2026-46863)

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

The versions of MySQL Cluster installed on the remote host are affected by multiple vulnerabilities as referenced in the June 2026 CPU advisory.

  - Vulnerability in the MySQL NDB Cluster product of Oracle MySQL (component: Cluster: NDB Operator). Supported     versions that are affected are 8.0.11-8.0.46, 8.4.0-8.4.9 and 9.0.0-9.7.0. Easily exploitable vulnerability     allows low privileged attacker with network access via HTTP to compromise MySQL NDB Cluster. While the     vulnerability is in MySQL NDB Cluster, attacks may significantly impact additional products (scope change).
    Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to     critical data or all MySQL NDB Cluster accessible data as well as unauthorized access to critical data or complete     access to all MySQL NDB Cluster accessible data. (CVE-2026-46861)

  - Vulnerability in the MySQL Cluster product of Oracle MySQL (component: Server: Connection Handling). Supported     versions that are affected are 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 Cluster. Successful     attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash     (complete DOS) of MySQL Cluster. (CVE-2026-46863)

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

The versions of MySQL Server installed on the remote host are affected by a vulnerability as referenced in the June 2026 CPU advisory.

  - Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Connection Handling). 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 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. (CVE-2026-46863)

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

ID	Name	Product	Family	Severity
324984	Fedora 43 : mysql8.4 (2026-280245e2ea)	Nessus	Fedora Local Security Checks	high
324925	Fedora 44 : mysql8.4 (2026-8c7f5e32c5)	Nessus	Fedora Local Security Checks	high
323930	Photon OS 5.0: Mysql PHSA-2026-5.0-0908	Nessus	PhotonOS Local Security Checks	high
322263	Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : MySQL vulnerabilities (USN-8457-1)	Nessus	Ubuntu Local Security Checks	high
321654	Linux Distros Unpatched Vulnerability : CVE-2026-46863	Nessus	Misc.	high
321537	Oracle MySQL Cluster 9.x < 9.7.1 (June 2026 CPU)	Nessus	Databases	critical
321536	Oracle MySQL Cluster 8.4.x < 8.4.10 (June 2026 CPU)	Nessus	Databases	critical
321535	Oracle MySQL Cluster 8.0.x < 8.0.47 (June 2026 CPU)	Nessus	Databases	critical
321533	Oracle MySQL Server 8.4.x < 8.4.10 (June 2026 CPU)	Nessus	Databases	high
321532	Oracle MySQL Server 9.x < 9.7.1 (June 2026 CPU)	Nessus	Databases	high

Detections

Analytics

CVE-2026-46863

high

Tenable Plugins

high

high

high

high

high

critical

critical

critical

high

high