{"id":"CVE-2026-55854","summary":"MariaDB Connector/Node.js: Cleartext Transmission of Sensitive Information and Insufficiently Protected Credentials in mariadb","details":"MariaDB Connector/Node.js is used to connect applications developed on Node.js to MariaDB and MySQL databases. Prior to 3.2.4, 3.3.3, 3.4.6, and 3.5.3, MariaDB Connector/Node.js can disclose an account password when PAM dialog authentication is negotiated over an insecure transport. In lib/cmd/handshake/auth/pam-password-auth.js and lib/cmd/handshake/authentication.js, the SendPamAuthPacketFactory behavior for the server-side plugin dialog lacked the secure-transport gate applied to mysql_clear_password. With the default sslMode=DISABLE and restrictedAuth=null settings, a hostile or on-path server can send an Authentication Switch Request for dialog over plain TCP, causing the connector to return the account password in cleartext. Properly verified TLS and a local Unix socket prevent this path, while fingerprint-only server identity validation is not sufficient. This issue is fixed in versions 3.2.4, 3.3.3, 3.4.6, and 3.5.3.","aliases":["BIT-mariadb-2026-55854","BIT-mariadb-min-2026-55854","BIT-mysql-client-2026-55854","GHSA-42r5-vhpq-m858"],"modified":"2026-09-02T16:25:25.069597389Z","published":"2026-08-28T22:03:30.200Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55854.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-319","CWE-522"]},"references":[{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.2.4"},{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.3.3"},{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.4.6"},{"type":"WEB","url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.5.3"},{"type":"WEB","url":"https://jira.mariadb.org/browse/CONJS-353"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55854.json"},{"type":"ADVISORY","url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-42r5-vhpq-m858"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55854"},{"type":"FIX","url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/29733403cfe6519cdfe9c36c93765a468fbe285d"},{"type":"FIX","url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/53b304264df84496d331dba2765c3634602f342e"},{"type":"FIX","url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/9781de636841d34afdd08d81dd07d43edb82f85c"},{"type":"FIX","url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/fbc159c2c8bd18c2db2d2e6587ab3020bbda64b6"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mariadb-corporation/mariadb-connector-nodejs","events":[{"introduced":"0"},{"introduced":"b65aca10b77f5ede83f16a8edd0537b2ef12a16f"},{"introduced":"24a58245cba201da91f41f7f96f8dd165d31c6c7"},{"fixed":"e0064ca9171b0046ad4be1a1dc1771e7dd0bcd96"},{"fixed":"14e0f16bd78584b3b24db33c1c6e62e3a3d241a2"},{"fixed":"07e6f631a6052649b72e9aa024583d305ac7611d"},{"fixed":"1d50f7210af2e01bf90b155e073f041952901839"},{"fixed":"29733403cfe6519cdfe9c36c93765a468fbe285d"},{"fixed":"53b304264df84496d331dba2765c3634602f342e"},{"fixed":"9781de636841d34afdd08d81dd07d43edb82f85c"},{"fixed":"fbc159c2c8bd18c2db2d2e6587ab3020bbda64b6"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.2.4"},{"introduced":"3.5.0"},{"fixed":"3.5.3"},{"introduced":"3.3.0"},{"fixed":"3.3.3"},{"introduced":"3.4.0"},{"fixed":"3.4.6"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["3.5.2","3.5.1","3.4.5","3.5.0-rc.0","3.4.4","3.4.3","3.3.2","3.4.2","3.4.1","3.2.3","3.4.0","3.3.1","3.3.0","3.2.2","3.2.1","3.2.0","3.0.0-ga","2.5.6","2.5.4","2.5.3","2.5.2","2.5.1","2.5.0","2.4.2","2.4.1","2.4.0","2.3.0","2.2.0","2.1.5","2.1.4","2.1.3","2.1.2","2.1.1","2.1.0","2.0.5","2.0.3","0.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55854.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}