Vulnerability in Mariadb Server
CVE-2026-107819
MariaDB Connector/C is a C and C++ client library for connecting applications to MariaDB and MySQL databases. From 3.4.1 until 3.4.10, the MariaDB Connector/C libmariadb Zero-Configuration SSL authentication-switch logic checked certificate trust failure but did not reject a TLS hostname verification mismatch before selecting a non-hashing authentication plugin. An active man-in-the-middle attacker with a valid certificate for another hostname could request mysql_clear_password and obtain the database password inside the attacker-controlled TLS connection. Other MariaDB connectors are not affected. This issue is fixed in version 3.4.10.
Published .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Mariadb Server — versions >= 3.4.1, < 3.4.10
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-107819?
- CVE-2026-107819 is a medium-severity vulnerability in Mariadb Server, classified under Improper Validation of Certificate with Host Mismatch. CVSS score: 5.9/10. Published 2026-10-09.
- How severe is CVE-2026-107819?
- Medium severity. CVSS v3 base score is 5.9 out of 10.