{"id":"CVE-2026-55854","state":"PUBLISHED","title":"MariaDB Connector/Node.js: Cleartext Transmission of Sensitive Information and Insufficiently Protected Credentials in mariadb","description":"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.","publishedAt":"2026-08-28T22:03:30.200Z","updatedAt":"2026-08-31T18:53:32.987Z","severity":{"score":5.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["mariadb-corporation mariadb-connector-nodejs"],"affected":[{"vendor":"mariadb-corporation","product":"mariadb-connector-nodejs","versions":[{"version":"< 3.2.4","status":"affected"},{"version":">= 3.3.0, < 3.3.3","status":"affected"},{"version":">= 3.4.0, < 3.4.6","status":"affected"},{"version":">= 3.5.0, < 3.5.3","status":"affected"}]}],"references":["https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-42r5-vhpq-m858","https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/29733403cfe6519cdfe9c36c93765a468fbe285d","https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/53b304264df84496d331dba2765c3634602f342e","https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/9781de636841d34afdd08d81dd07d43edb82f85c","https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/fbc159c2c8bd18c2db2d2e6587ab3020bbda64b6","https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.2.4","https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.3.3","https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.4.6","https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.5.3","https://jira.mariadb.org/browse/CONJS-353"],"weaknesses":["CWE-319","CWE-522"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55854.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55854","state":"PUBLISHED","datePublished":"2026-08-28T22:03:30.200Z","dateUpdated":"2026-08-31T18:53:32.987Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-17T16:44:40.995Z"},"containers":{"cna":{"title":"MariaDB Connector/Node.js: Cleartext Transmission of Sensitive Information and Insufficiently Protected Credentials in mariadb","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"mariadb-corporation","product":"mariadb-connector-nodejs","versions":[{"version":"< 3.2.4","status":"affected"},{"version":">= 3.3.0, < 3.3.3","status":"affected"},{"version":">= 3.4.0, < 3.4.6","status":"affected"},{"version":">= 3.5.0, < 3.5.3","status":"affected"}]}],"references":[{"url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-42r5-vhpq-m858","name":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-42r5-vhpq-m858","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/29733403cfe6519cdfe9c36c93765a468fbe285d","name":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/29733403cfe6519cdfe9c36c93765a468fbe285d","tags":["x_refsource_MISC"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/53b304264df84496d331dba2765c3634602f342e","name":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/53b304264df84496d331dba2765c3634602f342e","tags":["x_refsource_MISC"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/9781de636841d34afdd08d81dd07d43edb82f85c","name":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/9781de636841d34afdd08d81dd07d43edb82f85c","tags":["x_refsource_MISC"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/fbc159c2c8bd18c2db2d2e6587ab3020bbda64b6","name":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/fbc159c2c8bd18c2db2d2e6587ab3020bbda64b6","tags":["x_refsource_MISC"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.2.4","name":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.2.4","tags":["x_refsource_MISC"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.3.3","name":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.3.3","tags":["x_refsource_MISC"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.4.6","name":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.4.6","tags":["x_refsource_MISC"]},{"url":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.5.3","name":"https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.5.3","tags":["x_refsource_MISC"]},{"url":"https://jira.mariadb.org/browse/CONJS-353","name":"https://jira.mariadb.org/browse/CONJS-353","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-319","lang":"en","description":"CWE-319: Cleartext Transmission of Sensitive Information","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-522","lang":"en","description":"CWE-522: Insufficiently Protected Credentials","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-28T22:03:30.200Z"},"source":{"advisory":"GHSA-42r5-vhpq-m858","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-31T15:21:07.524278Z","id":"CVE-2026-55854","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-31T18:53:32.987Z"}}]}}}