---
id: CVE-2026-73476
title: >-
  Improper Handling of Case Sensitivity vulnerability in Drupal External
  Authentication allows Privilege Escalation
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.
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-178
vendor: external_authentication_project
product: external_authentication
affected:
  - external_authentication < 2.0.13
  - 'external_authentication >= 8.x-1.0, <= 8.x-1.4'
patched:
  - external_authentication 2.0.13
published: '2026-09-02'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T12:28:25.280'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-73476'
references:
  - url: 'https://www.drupal.org/sa-contrib-2026-098'
    label: mlhess@drupal.org
tags:
  - nvd
epss: 0.00296
epssPercentile: 0.2001
ingestedAt: '2026-09-15T12:36:50.170Z'
---

## Overview

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

- `external_authentication < 2.0.13`
- `external_authentication >= 8.x-1.0, <= 8.x-1.4`

## Remediation

Upgrade past the affected range:

- `external_authentication 2.0.13`