CRITICAL

CVE-2026-16639

Drupal — Internationalization Single Sign-On

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.

CVSS9.8

EPSS0.3%

Exploit StatusNot Assessed

PublishedAug 25, 2026

Last ModifiedAug 28, 2026

VendorDrupal

ProductInternationalization Single Sign-On

Weakness (CWE)CWE-288

View on NVD

Vulnerability Timeline

PublishedAug 25, 2026

Last ModifiedAug 28, 2026

Seraph Context

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References

https://www.drupal.org/sa-contrib-2026-081

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