MariaDB Connector/Node.js: Uncaught exception crashes the client during ed25519 authentication with zero-configuration TLS

{
  "id": "a110565fc68622540ec996ed14a7734e6073e22fa4dade7cbf78ec05f503dd56",
  "url": "https://osv.dev/vulnerability/GHSA-cx2f-j9fh-8g68",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "MariaDB Connector/Node.js: Uncaught exception crashes the client during ed25519 authentication with zero-configuration TLS",
    "summary": "### Description On the zero-configuration TLS path, the connector accepts a self-signed server certificate at the TLS level and then validates the server's identity from the fingerprint hash the server appends to the final OK_Packet (`Authentication.validateFingerPrint`). That validation calls `hash()` on the authentication plugin in use to obtain the password-derived secret both sides combine with the seed and the certificate fingerprint. `Ed25519PasswordAuth.hash()` referenced an identifier `seed` that was not in scope: it was neither a parameter of the method nor a module-scope binding, existing only as a parameter of the unrelated static `encryptPassword(password, seed)`. Invoking the method therefore threw `ReferenceError: seed is not defined`. The throw happens synchronously inside the socket `data` handler, and no frame between `PacketInputStream.onData()` and the plugin guards it, so the error escapes as an uncaught exception rather than surfacing as a connection error. Because the fingerprint hash is what a legitimate MariaDB server sends on this path, ed25519 authentication with zero-configuration TLS never completed successfully — the failure is not limited to a hostile server. ### Impact Denial of service against the client process. Under Node's default `uncaughtException` behaviour the process exits, so a long-running service is terminated rather than seeing a failed connection attempt. No credential is disclosed and no data is altered; the impact is availability",
    "evidence": "osv:GHSA-cx2f-j9fh-8g68",
    "products": [
      {
        "name": {
          "value": "mariadb",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.5.4",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "GHSA-cx2f-j9fh-8g68",
      "aliases": [
        "BIT-mariadb-2026-107382",
        "BIT-mariadb-min-2026-107382",
        "BIT-mysql-client-2026-107382",
        "CVE-2026-107382",
        "GHSA-cx2f-j9fh-8g68"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "3.3.0"
                },
                {
                  "fixed": "3.5.4"
                }
              ]
            }
          ],
          "package": {
            "name": "mariadb",
            "purl": "pkg:npm/mariadb",
            "ecosystem": "npm"
          },
          "database_specific": {
            "source": "https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/10/GHSA-cx2f-j9fh-8g68/GHSA-cx2f-j9fh-8g68.json"
          }
        }
      ],
      "modified": "2026-10-16T09:56:02.258409116Z",
      "provider": "osv",
      "references": [
        "https://github.com/mariadb-corporation/mariadb-connector-nodejs/security/advisories/GHSA-cx2f-j9fh-8g68",
        "https://github.com/mariadb-corporation/mariadb-connector-nodejs/commit/784ca3d757194a05f202d84b0c762321e76a7915",
        "https://github.com/mariadb-corporation/mariadb-connector-nodejs",
        "https://github.com/mariadb-corporation/mariadb-connector-nodejs/releases/tag/3.5.4",
        "https://jira.mariadb.org/browse/CONJS-356"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-248"
        ],
        "severity": "MODERATE",
        "github_reviewed": true,
        "nvd_published_at": null,
        "github_reviewed_at": "2026-10-08T19:42:04Z"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-107382",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 338739,
  "published_at": "2026-10-08T19:42:04+00:00"
}