Critical severity · published Oct 16, 2026
CVE-2026-92262
MariaDB: Numerous issues caused by historical #mysql50# tablename encoding bypass.
9.9
CVSS
1.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 73% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
server · MariaDB
>= 10.6.1, < 10.6.28; >= 10.11.1, < 10.11.19; >= 11.4.1, < 11.4.13; >= 11.8.1, < 11.8.9; >= 12.3.1, < 12.3.3; >= 13.0.1, < 13.0.2 · source: vendor
MA
Mariadb · Mariadb
10.6.1 before 10.6.28; 10.11.1 before 10.11.19; 11.4.1 before 11.4.13; 11.8.1 before 11.8.9; 12.3.1 before 12.3.3; 13.0.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-92262
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-92262
Patch
https://github.com/MariaDB/server/commit/574ba66b2d6c5d71db83d416677876e9b592858e
Patch
https://github.com/MariaDB/server/commit/f277eefa424850a8cba5c2371406047f6395e8bb
Release Notes
https://github.com/MariaDB/server/releases/tag/mariadb-10.11.19
Release Notes
https://github.com/MariaDB/server/releases/tag/mariadb-10.6.28
Release Notes
https://github.com/MariaDB/server/releases/tag/mariadb-11.4.13
Release Notes
https://github.com/MariaDB/server/releases/tag/mariadb-11.8.9
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