External Authentication - Moderately critical - Access bypass - SA-CONTRIB-2026-098

{
  "id": "8c2a4b1d0f6fe8ae1c49fb8c50572df15df937ec86f4b4748dd77eb0527f5391",
  "url": "https://osv.dev/vulnerability/CVE-2026-73476",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "External Authentication - Moderately critical - Access bypass - SA-CONTRIB-2026-098",
    "summary": "Improper Handling of Case Sensitivity vulnerability in Drupal External Authentication allows Privilege Escalation. This issue affects External Authentication versions: from 0.0.0 to 2.0.13.",
    "evidence": "osv:CVE-2026-73476",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-73476",
      "aliases": [
        "CVE-2026-73476",
        "DRUPAL-CONTRIB-2026-098"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.drupalcode.org/project/externalauth",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b705c6c2f6b0e6b8e4b9f3949db8eaebdc6fac85"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.0.0"
                      },
                      {
                        "fixed": "2.0.13"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.0.12",
            "2.0.11",
            "2.0.10",
            "2.0.9",
            "2.0.8",
            "2.0.7",
            "2.0.6",
            "2.0.5",
            "2.0.4",
            "2.0.3",
            "2.0.2",
            "2.0.1",
            "2.0.0",
            "8.x-1.4",
            "8.x-1.3",
            "8.x-1.2",
            "8.x-1.1",
            "8.x-1.0",
            "8.x-1.0-alpha4",
            "8.x-1.0-alpha3",
            "8.x-1.0-alpha2",
            "8.x-1.0-alpha1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73476.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.233703002Z",
      "provider": "osv",
      "references": [
        "https://git.drupalcode.org/project/externalauth",
        "https://www.drupal.org/project/externalauth",
        "https://www.drupal.org/sa-contrib-2026-098",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73476.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-73476"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-178"
        ],
        "cna_assigner": "drupal",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73476.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-73476",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 492954,
  "published_at": "2026-09-02T12:32:38.621+00:00"
}