CVE-2026-16639
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
ProductDrupal/i18n Sso
PublishedAug 25, 2026
First seenAug 25, 2026
Weakness typeCWE-288CWE-288
How to fix
Update
- drupal/i18n_sso1.8.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| drupal/i18n_ssoPackagist:https://packages.drupal.org/8 | v < 1.8.0 | 1.8.0 |
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