SB2026081358 - Improper access control in External Authentication module for Drupal

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Main Vulnerability Database SB2026081358

SB2026081358 - Improper access control in External Authentication module for Drupal

Published: August 13, 2026

Security Bulletin ID SB2026081358
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper access control (CVE-ID: CVE-2026-73476)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to the affected module does not sufficiently ensure exact matching of externally supplied identity values when storing and looking up authentication mappings under certain database collation configurations. A remote user can bypass implemented security restrictions and gain unauthorized access to the application.


Remediation

Install update from vendor's website.

References