id: CVE-2025-34291

info:
  name: "Langflow - Remote Code Execution"
  author: vedas-arpsyndicate
  severity: critical
  description: |
    Langflow versions up to and including 1.6.9 contain a chained vulnerability that enables account takeover and
    remote code execution. An overly permissive CORS configuration (allow_origins='*' with allow_credentials=True)
    combined with a refresh token cookie configured as SameSite=None allows a malicious webpage to perform cross-
    origin requests that include credentials and successfully call the refresh endpoint.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2025-34291&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=langflow&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
    cvss-score: 9.4
    cve-id: CVE-2025-34291
    cwe-id: CWE-942
  metadata:
    verified: false
  tags: cve,cve2025,langflow,cors,misconfig,vuln,oss,vkev,kev
flow: http(1) && http(2)

http:
  - raw:
      - |
        GET / HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: word
        part: body
        words:
          - "Langflow"
        internal: true

  - raw:
      - |
        OPTIONS /api/v1/refresh HTTP/1.1
        Host: {{Hostname}}
        Origin: https://scanme.sh
        Access-Control-Request-Method: POST
        Access-Control-Request-Headers: content-type

    matchers-condition: and
    matchers:
      - type: word
        part: header
        words:
          - "Access-Control-Allow-Origin: https://scanme.sh"
          - "Access-Control-Allow-Credentials: true"
        condition: and

      - type: status
        part: header
        status:
          - 200