MariaDB Server 10.6-13.0.2 #mysql50# Prefix Bypass RCE
CVE-2026-92262 Published on October 16, 2026
MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.
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.
Vulnerability Analysis
CVE-2026-92262 is exploitable with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
Weakness Type
Use of Incorrectly-Resolved Name or Reference
The software uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere.
Affected Versions
MariaDB server:- Version >= 10.6.1, < 10.6.28 is affected.
- Version >= 10.11.1, < 10.11.19 is affected.
- Version >= 11.4.1, < 11.4.13 is affected.
- Version >= 11.8.1, < 11.8.9 is affected.
- Version >= 12.3.1, < 12.3.3 is affected.
- Version >= 13.0.1, < 13.0.2 is affected.