CVE-2026-87937 | BDVDB-2026-394339 Detail

DrupalCentral Authentication System (CAS) Server

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.

Impact#

CAPEC-194 Fake the Source of Data

Weaknesses#

CWE-601 URL Redirection to Untrusted Site ('Open Redirect')

References#

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

Exploit#

No public exploit known

History#

Version 12026-10-22Record published in the CVE List.

Published

Published: 2026-10-22
Last modified: 2026-10-22

Vendor information

Vendor: Drupal
Product: Central Authentication System (CAS) Server

All Drupal vulnerabilities

Score

6.5 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 21.1.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 0.0.0 and < 2.0.4
Fixed
2.0.4
Vulnerable
>= 2.1.0 and < 2.1.3
Fixed
2.1.3

Scoring System

CVSS v4.0

Not available

CVSS v3.1

6.5 Medium

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).