CVE-2026-87937 json
Central Authentication System (CAS) Server - Moderately critical - Open redirect - SA-CONTRIB-2026-135
published 2026-09-09 2 mo ago modified 2026-10-22 17 d ago also DRUPAL-CONTRIB-2026-135 , EUVD-2026-107864
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- packagist drupal/cas_server 2.0.4, 2.1.3
- Drupal Central Authentication System (CAS) Server 2.0.4, 2.1.3
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 17 d ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | drupal/cas_server | <2.0.4 >=2.1.0, <2.1.3 |
2.0.4 2.1.3 |
Affected products
- Drupal Central Authentication System (CAS) Server
Classification
- Weakness
-
- CWE-601 URL Redirection to Untrusted Site
References
Sources
- CVE List CVE-2026-87937
- NVD CVE-2026-87937
- OSV DRUPAL-CONTRIB-2026-135
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