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Back to active CVEs
Medium · CVSS 6.5CVE-2026-87937

Central Authentication System (CAS) Server - Moderately critical - Open redirect - SA-CONTRIB-2026-135CVE-2026-87937

Answer in brief

CVE-2026-87937 records a Medium severity (CVSS 6.5) vulnerability in Central Authentication System (CAS) Server - Moderately critical - Open redirect - SA-CONTRIB-2026-135. The current sources do not mark it as known exploited. The current feed maps Drupal/Central Authentication System (CAS) Server (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 Oct 22, 2026Updated Oct 22, 2026Source checked Oct 25, 2026First seen by HOL Oct 22, 2026Material review Oct 22, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.5. 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/Central Authentication System (CAS) Server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Drupal/Central Authentication System (CAS) Servergeneric>=0.0.0 <2.0.4 || >=2.1.0 <2.1.32.0.4, 2.1.3

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Drupal/Central Authentication System (CAS) Server.
  2. 2Review the reported fix. Update Drupal/Central Authentication System (CAS) Server to 2.0.4 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 22, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 22, 2026

Sources and claim methodology

  • Source referencedrupal.org
Upstream source description

URL Redirection to Untrusted Site ('Open Redirect') vulnerability in Drupal Central Authentication System (CAS) Server allows Fake the Source of Data. This issue affects Central Authentication System (CAS) Server versions: from 0.0.0 to 2.0.4, from 2.1.0 to 2.1.3.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-601
Source
CVE List V5
Source checked
Oct 25, 2026
References
1 linked source
Open source record