Vulnerability in MariaDB server

[ Why it matters ]Priority signals

• Critical severity: CVSS 9.9

[ Description ]Official description

MariaDB server is a community developed fork of MySQL server. From 10.6.1 until 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2, the #mysql50# bypass prefix is affected because it allows the #mysql50# prefix to bypass normal table-name filesystem encoding. An attacker can trigger the issue with a table name using the #mysql50# prefix, then use a #mysql50# table name to access files under their legacy unencoded name and cause crashes, data corruption, data exfiltration, or remote code execution. This issue is fixed in versions 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, and 13.0.2.

[ Fixes ]Fixes and patches

• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD
• Patch on github.comVendor patch or bulletin · NVD · Reference tagged 'Patch' by NVD

[ Advisories ]Government CERT advisories

• BSI CERT-Bund18 Oct 2026WID-SEC-2026-4018

  MariaDB: Multiple vulnerabilities Translated from German

  CVE-2026-85985CVE-2026-97380CVE-2026-85745+4 more CVEs

[ References ]References

• github.com/MariaDB/server/commit/574ba66b2d6c5d71db83d416677876e9b592858ePatch
• github.com/MariaDB/server/commit/f277eefa424850a8cba5c2371406047f6395e8bbPatch
• github.com/MariaDB/server/releases/tag/mariadb-10.11.19Release Notes
• github.com/MariaDB/server/releases/tag/mariadb-10.6.28Release Notes
• github.com/MariaDB/server/releases/tag/mariadb-11.4.13Release Notes
• github.com/MariaDB/server/releases/tag/mariadb-11.8.9Release Notes
• github.com/MariaDB/server/releases/tag/mariadb-12.3.3Release Notes
• github.com/MariaDB/server/releases/tag/mariadb-13.0.2Release Notes
• github.com/MariaDB/server/security/advisories/GHSA-65jj-h265-3m7hVendor Advisory
• jira.mariadb.org/browse/MDEV-40362Issue Tracking