CVE-2026-44172: MariaDB: mysql_real_escape_string() incorrectly handled big5

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-12 · updated 2026-10-26
Weakness: CWE-89

Description

MariaDB server is a community developed fork of MySQL server. In versions 3.3.18 and 3.4.8, an application that was taking non-validated user input, escaping it with mysql_real_escape_string() and sending it to the database using text protocol and big5 character set was vulnerable to SQL injections, even though mysql_real_escape_string() was supposed to prevent them. This issue has been patched in versions 3.3.19 and 3.4.9.

Affected products

MariaDB: 3.3.18, 3.4.8
Red Hat Enterprise Linux: 10.0

References

https://github.com/MariaDB/server/security/advisories/GHSA-pv9p-5w55-55jm
https://jira.mariadb.org/browse/CONC-819
https://access.redhat.com/errata/RHSA-2026:30135
https://access.redhat.com/errata/RHSA-2026:43505
https://access.redhat.com/errata/RHSA-2026:47772
https://access.redhat.com/errata/RHSA-2026:68567
https://access.redhat.com/security/cve/CVE-2026-44172
https://bugzilla.redhat.com/show_bug.cgi?id=2488459
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44172.json

Get alerted when CVE-2026-44172 or the next vulnerability affects your stack