CVE-2026-87937 json
Central Authentication System (CAS) Server - Moderately critical - Open redirect - SA-CONTRIB-2026-135
published 2mo ago modified 20d 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
Is CVE-2026-87937 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 20d ago
Exploit prediction
0.28% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-11).
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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