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

Quick assessment

Affected
Drupal Central Authentication System (CAS) Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Drupal 中央认证系统（CAS）服务器中存在“重定向到不可信网站”（即“开放重定向”）漏洞，该漏洞可被利用来伪造数据来源。此问题影响以下版本的 CAS 服务器：0.0.0 至 2.0.4，以及 2.1.0 至 2.1.3。

AI Predicted 5.4 Difficulty: Trivial
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I. Basic Information for CVE-2026-87937

Vulnerability Information
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Vulnerability Title
Central Authentication System (CAS) Server - Moderately critical - Open redirect - SA-CONTRIB-2026-135
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Drupal Central Authentication System (CAS) Server 0.0.0 ~ 2.0.4 -

II. Public POCs for CVE-2026-87937

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III. Intelligence Information for CVE-2026-87937

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Other References for CVE-2026-87937 (1)

Same Patch Batch · Drupal · 2026-10-22 · 72 CVEs total

CVE-2026-96369 Webform - Less critical - Access bypass - SA-CONTRIB-2026-165
CVE-2026-96392 AI CKEditor - Moderately critical - Code execution via Twig templates - SA-CONTRIB-2026-18
CVE-2026-96388 Tawk.to - Live chat application - Critical - Cross Site Request Forgery - SA-CONTRIB-2026-
CVE-2026-96398 Webform - Less critical - Access bypass - SA-CONTRIB-2026-173
CVE-2026-96357 Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-172
CVE-2026-96364 Webform - Moderately critical - Access bypass - SA-CONTRIB-2026-171
CVE-2026-96365 Webform - Less critical - Denial of service - SA-CONTRIB-2026-170
CVE-2026-96366 Webform - Moderately critical - Access bypass - SA-CONTRIB-2026-169
CVE-2026-96373 Webform - Moderately critical - Access bypass - SA-CONTRIB-2026-168
CVE-2026-96372 Webform - Moderately critical - Access bypass - SA-CONTRIB-2026-167
CVE-2026-96356 Webform - Moderately critical - Access bypass - SA-CONTRIB-2026-174
CVE-2026-96371 Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-166
CVE-2026-96370 Webform - Moderately critical - Access bypass, Server-side request forgery - SA-CONTRIB-20
CVE-2026-96368 Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-163
CVE-2026-96367 Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-162
CVE-2026-96363 Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-161
CVE-2026-96359 Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-159
CVE-2026-96362 Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-160
CVE-2026-96358 Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-158
CVE-2026-96361 Webform - Moderately critical - Cross-site scripting - SA-CONTRIB-2026-155

Showing top 20 of 72 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Central Authentication System (CAS) Server
Same vendor: Drupal
Same weakness: CWE-601

V. Comments for CVE-2026-87937

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