{"id":"CVE-2026-107819","aliases":["BELL-CVE-2026-107819","EUVD-2026-95920","GHSA-fmq9-qjxj-qpf7","UBUNTU-CVE-2026-107819"],"status":"published","title":"MariaDB Connector/C: libmariadb allowed cleartext password leakage on TLS hostname verification failure","description":"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.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00346,"percentile":0.2859,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-297"],"published":"2026-10-09T17:25:45Z","modified":"2026-11-03T07:15:07Z","fixes":[{"ecosystem":"Alpaquita:25","package":"mariadb","fixed_in":["11.4.13-r0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpaquita:25","package":"mariadb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"11.4.5-r0"},{"fixed":"11.4.13-r0"}]}]},{"source":"osv","ecosystem":"Alpaquita:stream","package":"mariadb-connector-c","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.4.6-r0"}]}]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"mariadb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:10.11.4-1","1:10.11.5-3","1:10.11.6-1","1:10.11.6-2","1:10.11.7-2ubuntu1","1:10.11.7-2ubuntu2","1:10.11.8-0ubuntu0.24.04.1","1:10.11.11-0ubuntu0.24.04.2","1:10.11.13-0ubuntu0.24.04.1","1:10.11.14-0ubuntu0.24.04.1"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"mariadb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:11.8.6-5","1:11.8.8-1","1:11.8.9+ds-4ubuntu2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"mariadb","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:11.8.3-1build1","1:11.8.5-1","1:11.8.5-2","1:11.8.5-3","1:11.8.5-4","1:11.8.6-1","1:11.8.6-3","1:11.8.6-4","1:11.8.6-5","1:11.8.6-5ubuntu0.1"]}],"products":[{"vendor":"devolutions","product":"server"},{"vendor":"mariadb","product":"server"}],"references":[{"url":"https://github.com/MariaDB/server/security/advisories/GHSA-fmq9-qjxj-qpf7","tags":["x_refsource_CONFIRM","advisory","report"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-c/commit/e8c0a16d94ddf844668d684a7d42b37ac8e0fc02","tags":["x_refsource_MISC","fix","report"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-c/releases/tag/v3.4.10","tags":["x_refsource_MISC","web","report"]},{"url":"https://jira.mariadb.org/browse/CONC-846","tags":["x_refsource_MISC","web","report"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-107819","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107819.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-107819","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-107819","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-107819","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-107819","title":"MariaDB Connector/C: libmariadb allowed cleartext password leakage on TLS hostname verification failure","description":"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.","status":"published","published":"2026-10-09T17:25:45.082Z","modified":"2026-10-09T17:59:15.334Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-297"],"updated_at":"2026-11-02T13:45:25.313702Z"}],"euvd":[{"id":"EUVD-2026-95920","description":"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.","status":"published","published":"2026-10-09T17:25:45Z","modified":"2026-10-09T17:59:15Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T17:27:24.64208Z"}],"nvd":[{"id":"CVE-2026-107819","description":"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.","status":"published","published":"2026-10-09T18:17:03.533Z","modified":"2026-10-13T15:27:56.817Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-297"],"updated_at":"2026-11-02T14:12:55.473789Z"}],"osv":[{"id":"BELL-CVE-2026-107819","status":"published","published":"2026-10-10T06:05:11.577065Z","modified":"2026-11-03T07:15:07.527512183Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-03T07:52:02.098855Z"},{"id":"CVE-2026-107819","title":"MariaDB Connector/C: libmariadb allowed cleartext password leakage on TLS hostname verification failure","description":"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.","status":"published","published":"2026-10-09T17:25:45.082Z","modified":"2026-10-28T10:51:15.013299359Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-297"],"updated_at":"2026-11-02T15:44:54.933106Z"},{"id":"UBUNTU-CVE-2026-107819","description":"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.","status":"published","published":"2026-10-09T18:17:00Z","modified":"2026-10-17T12:58:01.713882858Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T16:55:59.130573Z"}]}}