CVE-2026-55854

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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."}], "source": {"advisory": "GHSA-42r5-vhpq-m858", "discovery": "UNKNOWN"}}, "adp": [{"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"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-31T18:53:32.987Z"}}]}}

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This issue is fixed in versions 3.2.4, 3.3.3, 3.4.6, and 3.5.3."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-319", "description": "CWE-319: Cleartext Transmission of Sensitive Information"}]}, {"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-522", "description": "CWE-522: Insufficiently Protected Credentials"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-28T22:03:30.200Z"}}}, "cveMetadata": {"cveId": "CVE-2026-55854", "state": "PUBLISHED", "dateUpdated": "2026-08-31T18:53:32.987Z", "dateReserved": "2026-06-17T16:44:40.995Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-08-28T22:03:30.200Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

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