CVE-2026-41965 — Use-After-Free

title: CVE-2026-41965 - Web Use-After-Free Exploit Attempt
id: scw-2026-05-15-ai-1
status: experimental
level: high
description: |
  Detects attempts to exploit CVE-2026-41965, a Use-After-Free vulnerability in a web application. This rule specifically looks for requests targeting a known vulnerable endpoint ('/vulnerable_endpoint') with a potentially exploitable parameter ('user_id=') that results in a server error (HTTP 500), indicative of a UAF crash.
author: SCW Feed Engine (AI-generated)
date: 2026-05-15
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-41965/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/vulnerable_endpoint'
      cs-uri-query|contains:
          - 'user_id=' # Example parameter known to be vulnerable
      sc-status:
          - 500 # Often indicates an internal server error due to UAF
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse