CVE-2026-55215: Mariadb True` Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-cqhc-2h57-wpxf",
  "modified" : "2026-08-28T19:03:38Z",
  "published" : "2026-08-28T19:03:38Z",
  "aliases" : [ "CVE-2026-55215" ],
  "summary" : "MariaDB's connector leaks the cleartext password to an MitM despite `ssl: true`",
  "details" : "### Summary\nWhen SSL/TLS is enabled but no CA / server certificate is provided, the\nconnector verifies the server's identity using fingerprint validation. The\ncheck is effective,  the connection is ultimately rejected when it fails, \nbut it happens *after* the authentication exchange. As a result, the\ncredentials are sent before validation occurs, so an active man-in-the-middle\nwho presents their own certificate receives the password in the handshake\nbefore the connection is aborted.\n\n### Impact\nThe credentials are transmitted to the peer before the server's identity is\nvalidated. An on-path attacker (MitM) presenting any certificate can capture\nthe account password, even though the connection then fails the fingerprint\ncheck and is closed. The disclosed credentials can subsequently be used to\nauthenticate directly against the server.\n\n- Attacker requirement: active man-in-the-middle position on the network path\n- Affected configuration: SSL/TLS enabled without a CA / server certificate\n\n### Affected versions\n- < 3.2.4\n- 3.3.0 – 3.3.2\n- 3.4.0 – 3.4.5\n- 3.5.0 – 3.5.2\n\n### Patches\nFixed in 3.2.4, 3.3.3, 3.4.6, and 3.5.3. Upgrade to one of these (or later)\non your branch.\n\n### Workarounds\nUntil you can upgrade, configure certificate verification explicitly, provide\nthe server/CA certificate and use a verifying SSL mode (e.g. VERIFY_CA /\nVERIFY_FULL). \n\nReported by haaahaaahiihiiii (no GitHub account).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "mariadb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "3.2.4"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "mariadb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.3.0"
      }, {
        "fixed" : "3.3.3"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "mariadb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.4.0"
      }, {
        "fixed" : "3.4.6"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "mariadb"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.5.0"
      }, {
        "fixed" : "3.5.3"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-cqhc-2h57-wpxf"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/514576a5a1fab3ea8498613e259a0b7a764e7302"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/c47d7275835c78c7eb8186cd23e9d57c045c128b"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/ecd36958e6e3bf0e0fa8389546f50c0ed6dbb2ac"
  }, {
    "type" : "WEB",
    "url" : "https://hackerone.com/reports/3777370"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/mariadb-corporation/mariadb-connector-nodejs"
  }, {
    "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-349"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-295", "CWE-522" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-28T19:03:38Z",
    "nvd_published_at" : null
  }
}