id: CVE-2026-39987

info:
  name: Marimo < 0.23.0 Pre-Auth RCE
  author: Security Researcher
  severity: critical
  description: Marimo versions prior to 0.23.0 have unauthenticated RCE via /terminal/ws
  reference:
    - https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc
  classification:
    cvss-score: 9.3
    cve-id: CVE-2026-39987
  metadata:
    verified: true
  tags: cve,cve2026,marimo,rce

http:
  # Verificar favicon de Marimo
  - method: GET
    path:
      - "{{BaseURL}}/favicon.ico"
    matchers:
      - type: dsl
        dsl:
          - "status_code == 200"
          - "mmh3(base64_py(body)) == -1864630356"
        condition: and
        internal: true

  # Obtener versión
  - method: GET
    path:
      - "{{BaseURL}}/api/version"
    extractors:
      - type: regex
        name: version
        group: 1
        regex:
          - '(0\.[0-9]+\.[0-9]+)'
        part: body
    matchers:
      - type: dsl
        dsl:
          - 'compare_versions(version, "< 0.23.0")'

  # Verificar WebSocket vulnerable
  - method: GET
    path:
      - "{{BaseURL}}/terminal/ws"
    matchers:
      - type: status
        status:
          - 101