Vulnerability from drupal
Published
2026-08-12 17:56
Modified
2026-08-13 17:59
Summary
Details

This module enables you to authenticate Drupal users against external identity providers.

The module does not sufficiently ensure exact matching of externally supplied identity values when storing and looking up authentication mappings under certain database collation configurations.

This vulnerability is minimally mitigated by the fact that it affects only sites using impacted MySQL or MariaDB collation settings for the module’s authentication mapping storage. Affected collations are quite common so all sites are encouraged to upgrade.

Credits
晉宇 林 (whale120) www.drupal.org/u/whale120
References
To clipboard 

{
  "affected": [
    {
      "database_specific": {
        "affected_versions": "\u003c2.0.13"
      },
      "package": {
        "ecosystem": "Packagist:https://packages.drupal.org/8",
        "name": "drupal/externalauth"
      },
      "ranges": [
        {
          "database_specific": {
            "constraint": "\u003c2.0.13"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "severity": []
    }
  ],
  "aliases": [
    "CVE-2026-73476"
  ],
  "credits": [
    {
      "contact": [
        "https://www.drupal.org/u/whale120"
      ],
      "name": "\u6649\u5b87 \u6797 (whale120)"
    }
  ],
  "details": "This module enables you to authenticate Drupal users against external identity providers.\n\nThe module does not sufficiently ensure exact matching of externally supplied identity values when storing and looking up authentication mappings under certain database collation configurations.\n\nThis vulnerability is minimally mitigated by the fact that it affects only sites using impacted MySQL or MariaDB collation settings for the module\u2019s authentication mapping storage. Affected collations are quite common so all sites are encouraged to upgrade.",
  "id": "DRUPAL-CONTRIB-2026-098",
  "modified": "2026-08-13T17:59:58.000Z",
  "published": "2026-08-12T17:56:03.000Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.drupal.org/sa-contrib-2026-098"
    }
  ],
  "schema_version": "1.7.0"
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.