CVE-2026-16639

Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081

Published Aug 25, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal Internationalization Single Sign-On allows Authentication Bypass. This issue affects Internationalization Single Sign-On versions: from 0.0.0 to 1.8.0.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
References
History
Type Values Removed Values Added
First Time appeared Drupal
Drupal internationalization Single Sign-on
Vendors & Products Drupal
Drupal internationalization Single Sign-on
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal Internationalization Single Sign-On allows Authentication Bypass. This issue affects Internationalization Single Sign-On versions: from 0.0.0 to 1.8.0.
Title Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081
Weaknesses CWE-288
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
drupal
Published
Updated
Aug 26, 2026, 3:23 PM
Reserved
Jul 22, 2026, 5:06 PM
Status
Awaiting Analysis
Published
Aug 25, 2026, 11:16 PM
Modified
Aug 28, 2026, 3:29 PM