CVE-2026-16639CWE-288

CVE-2026-16639

Critical · published August 26, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
29.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00366 · 29.2th percentile
Weakness
CWE-288 · Authentication Bypass Using an Alternate Path or Channel
Published
2026-08-26T03:16Z
References (1)
https://www.drupal.org/sa-contrib-2026-081 · [email protected]
EPSS history
Timeline
  • 27 AUG 06:19Z
    EPSS moved — → 0%
    epss
  • 25 AUG 22:22Z
    Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081
    cvelistv5