Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081 (CVE-2026-16639) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-16639

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

Answer in brief

CVE-2026-16639 records a Unknown severity vulnerability in Internationalization Single Sign-On - Critical - Access bypass - SA-CONTRIB-2026-081. The current sources do not mark it as known exploited. The current feed maps Drupal/Internationalization Single Sign-On (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 25, 2026Updated Aug 25, 2026Source checked Aug 25, 2026First seen by HOL Aug 25, 2026Material review Aug 25, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Drupal/Internationalization Single Sign-On (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Drupal/Internationalization Single Sign-Ongeneric	>=0.0.0 <1.8.0	1.8.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for Drupal/Internationalization Single Sign-On.
Review the reported fix. Update Drupal/Internationalization Single Sign-On to 1.8.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 25, 2026

Sources and claim methodology

Source referencedrupal.org

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.