CVE-2026-87937

mediumpriority · track · 0EPSS 0.003 · 21 %ileDEUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.28% (21st) EPSS

CVSS 6.5 · medium

Is it mine?

29 products

Check your exposure

Who says so?

2 sources

cert_bund · osv

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nsecondaryexploitability 3.9 · impact 2.5

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-601USCWE-601US

affected products (29)

Products and version ranges known to be affected.

Open Source Drupal CSP Log <1.0.2all versionscert_bundDE
Open Source Drupal Central Authentication System (CAS) <2.0.4all versionscert_bundDE
Open Source Drupal Central Authentication System (CAS) <2.1.3all versionscert_bundDE
Open Source Drupal Feed Block <2.0.2all versionscert_bundDE
Open Source Drupal Feed Block <3.0.2all versionscert_bundDE
Open Source Drupal Key Auth <2.2.4all versionscert_bundDE
Open Source Drupal Patreonall versionscert_bundDEcpe:/a:drupal:drupal:patreon
Open Source Drupal SAML SSO – Service Provider <3.2.0all versionscert_bundDE
Open Source Drupal SafeDelete <1.0.88all versionscert_bundDE
Open Source Drupal Taxonomy Term Glossary <4.6.0all versionscert_bundDE
Open Source Drupal Ultimate Table Field <1.1.1all versionscert_bundDE
Open Source Drupal Ultimate Table Field <2.0.1all versionscert_bundDE
Open Source Drupal amazee.ai Private AI Provider <1.3.7all versionscert_bundDE
Open Source Drupal amazee.ai Private AI Provider <1.4.3all versionscert_bundDE
Open Source Drupal≤ SAML SSO – Service Provider <3.2.0cert_bundDE
Open Source Drupal≤ SafeDelete <1.0.88cert_bundDE
Open Source Drupal≤ Taxonomy Term Glossary <4.6.0cert_bundDE
Open Source Drupal≤ Ultimate Table Field <1.1.1cert_bundDE
Open Source Drupal≤ Ultimate Table Field <2.0.1cert_bundDE
Open Source Drupal≤ amazee.ai Private AI Provider <1.3.7cert_bundDE

showing 20 of 29

advisories (2)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3284Drupal Erweiterungen: Mehrere SchwachstellenDeutsch2026-09-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Drupal ausnutzen, um Datenbankinhalte zu manipulieren oder auszulesen, Zugriffsbeschränkungen und Authentifizierungsmechanismen zu umgehen, vertrauliche Informationen offenzulegen, Cross Site Scripting Angriffe auszuführen, Benutzer auf manipulierte Webseiten umzuleiten, SAML-Authentifizierungen zu beeinflussen oder wiederzuverwenden, interne Ressourcen über SSRF anzusprechen sowie unberechtigt Dateien auf den Server hochzuladen.
DRUPAL-CONTRIB-2026-1352026-09-09vendor · osvUS
This module enables you to turn a Drupal install into the Central Authentication System (CAS) Server. It makes your database the primary location for other systems to use for authentication in a SSO environment. The module doesn't sufficiently check the service URL used to redirect the user during logout, leading to an open redirect. This vulnerability is mitigated by the fact that an attacker must convince a user to click a specially crafted link. The vulnerability cannot be exploited without user interaction and does not allow an attacker to directly compromise the CAS server or bypass authentication.

sources

Which sources assert this record, and when.

cert_bund osv NVD CVE.org MITRE

published 2026-10-22modified 2026-10-22

references (1) nvd

External citations — patches, advisories, analysis.

https://www.drupal.org/sa-contrib-2026-135

scry

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