CVE-2026-73476: External Authentication - Moderately critical - Access bypass - SA-CONTRIB-2026-098

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-02 · updated 2026-09-15
Weakness: CWE-178

Description

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.

Affected products

Drupal External Authentication: before 2.0.13; from 8.x-1.0 through 8.x-1.4 — fixed in 2.0.13

How to fix

Upgrade to a fixed version: Drupal External Authentication 2.0.13. Check the vendor advisory for mitigations.

References

https://www.drupal.org/sa-contrib-2026-098

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