CVE-2026-16639 - Internationalization Single Sign-On - Critical - Access bypass

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CRITICAL

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

Published Aug 25, 2026

9.8

CRITICAL

CVSS 3.1

EPSS 0.37%

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.

Affected products

Vendor Drupal Product Internationalization Single Sign-On Default
unknown
Affected
- ≥ 0.0.0, < 1.8.0

Default status is the baseline for the product. Each version can override it (patched versions can be marked unaffected).

Vendor	Product	Default status	Versions
Drupal	Internationalization Single Sign-On	unknown	Affected ≥ 0.0.0, < 1.8.0

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-288

References (2)

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-66181		Advisory
https://www.drupal.org/sa-contrib-2026-081

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner drupal

Published Aug 25, 2026

Updated Aug 26, 2026

Reserved Jul 22, 2026

Link CVE-2026-16639

CISA Vulnrichment

Updated Aug 26, 2026

NVD

Status Awaiting Analysis

Modified Aug 28, 2026

Link CVE-2026-16639

Red Hat

No data

ENISA EUVD

Assigner drupal

Published Aug 25, 2026

Updated Aug 26, 2026

Link EUVD-2026-66181

GitHub

No data