CVE-2026-42190 — RedwoodSDK is a server-first React framework. From version

title: RedwoodSDK Server Action CSRF via HTTP Method Enforcement Bypass — CVE-2026-42190
id: scw-2026-05-08-ai-1
status: experimental
level: high
description: |
  This rule detects attempts to exploit CVE-2026-42190 by identifying requests to RedwoodSDK server actions that originate from a different domain (indicated by the referer header) but are treated as same-site by the browser. The vulnerability lies in the lack of origin validation, allowing a Cross-Site Request Forgery (CSRF) attack where a victim's session cookie is attached to the malicious request.
author: SCW Feed Engine (AI-generated)
date: 2026-05-08
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-42190/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-method:
          - 'POST'
      referer|contains:
          - 'attacker.com'
      uri|contains:
          - '/rwsdk/server-actions/'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse