CVE-2026-73476

Analyzed Analyzed - Analysis Complete

Improper Case Handling in Drupal External Authentication

Publication date: 2026-09-02

Last updated on: 2026-09-15

Assigner: Drupal.org

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-02

Last Modified

2026-09-15

Generated

2026-09-23

AI Q&A

2026-09-02

EPSS Evaluated

2026-09-21

NVD

CVE-2026-73476

EUVD

EUVD-2026-69990

Affected Vendors & Products

Vendor	Product	Version / Range
external_authentication_project	external_authentication	to 2.0.13 (exc)
external_authentication_project	external_authentication	From 8.x-1.0 (inc) to 8.x-1.4 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-178	The product does not properly account for differences in case sensitivity when accessing or determining the properties of a resource, leading to inconsistent results.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper handling of case sensitivity in Drupal External Authentication that allows privilege escalation. It affects versions 0.0.0 to 2.0.13 of the External Authentication module.

Detection Guidance

To detect this vulnerability, check if the External Authentication module for Drupal is installed and verify its version. If the version is between 0.0.0 and 2.0.13, the system is vulnerable. Use commands like 'drush pm-list' or inspect the module files directly to confirm the version.

Impact Analysis

An attacker could exploit this to gain elevated privileges in a Drupal site using vulnerable External Authentication versions, potentially leading to unauthorized access or control.

Compliance Impact

The vulnerability involves improper handling of case sensitivity in Drupal External Authentication, enabling privilege escalation. This could lead to unauthorized access or data breaches, which may violate compliance requirements under GDPR, HIPAA, or other standards depending on the data processed.

Mitigation Strategies

Update External Authentication module to version 2.0.14 or later to address the privilege escalation risk.

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