{"id":"CVE-2026-107819","title":"MariaDB Connector/C is a C and C++ client library for connecting applications to MariaDB and MySQL databases","summary":"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 certific…","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","cwe":["CWE-297"],"published":"2026-10-09","updated":"2026-10-09","sourceUpdated":"2026-10-09T18:17:03.533","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-107819","references":[{"url":"https://github.com/MariaDB/server/security/advisories/GHSA-fmq9-qjxj-qpf7","label":"security-advisories@github.com"},{"url":"https://github.com/mariadb-corporation/mariadb-connector-c/commit/e8c0a16d94ddf844668d684a7d42b37ac8e0fc02","label":"security-advisories@github.com"},{"url":"https://github.com/mariadb-corporation/mariadb-connector-c/releases/tag/v3.4.10","label":"security-advisories@github.com"},{"url":"https://jira.mariadb.org/browse/CONC-846","label":"security-advisories@github.com"}],"tags":["nvd"],"ingestedAt":"2026-10-09T19:09:33.752Z","slug":"CVE-2026-107819","body":"## Overview\n\nMariaDB 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}