CVE-2026-92262 MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.
Attackers can exploit the #mysql50# prefix to bypass filesystem encoding, leading to file access, crashes, data corruption, or remote code execution.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-92262?
CVE-2026-92262 is a critical path traversal vulnerability in Mariadb Mariadb, published on 16 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-706
Which versions are affected by CVE-2026-92262?
3 open source packages ship an affected version, including mariadb, mariadb-min and mysql-client. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mariadb Bitnami | From 10.6.1 | 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 |
mariadb-min Bitnami | From 10.6.1 | 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 |
mysql-client Bitnami | From 10.6.1 | 10.6.28, 10.11.19, 11.4.13, 11.8.9, 12.3.3, 13.0.2 |
Products include Mariadb Mariadb.
How do I fix CVE-2026-92262?
Upgrade mariadb to a fixed version for your release line: 10.6.28, 10.11.19, 11.4.13 or 11.8.9.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-92262 being exploited?
There is no known exploitation of CVE-2026-92262 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Mariadb Mariadb
- CVE-2026-49261 MariaDB server has unsafe parameter handling in `wsrep_notify_cmd`
- CVE-2026-85746 MariaDB: Out-of-bound buffer write on in `ST_AsText` of nested GeometryCollections
- CVE-2026-85748 MariaDB: Use-after-free with a large number of SYS_REFCURSOR's
- CVE-2023-26785 Code injection in n/a
- CVE-2026-97380 MariaDB: GRANT PROXY with empty password incorrectly checks grantor's privileges
Sources
Also known as BELL-CVE-2026-92262, BIT-mariadb-2026-92262, BIT-mariadb-min-2026-92262, BIT-mysql-client-2026-92262, DEBIAN-CVE-2026-92262, ECHO-79ee-487c-f42f and 4 more.