mcp-server-semgrep/semgrep-rules/python/pyramid/audit/set-cookie-samesite-unsafe-value.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: pyramid-set-cookie-samesite-unsafe-value
  patterns:
  - pattern-either:
    - pattern-inside: |
        @pyramid.view.view_config(...)
        def $VIEW($REQUEST):
            ...
            $RESPONSE = $REQUEST.response
            ...
    - pattern-inside: |
        def $VIEW(...):
            ...
            $RESPONSE = pyramid.httpexceptions.HTTPFound(...)
            ...
  - pattern-not: $RESPONSE.set_cookie(..., **$PARAMS)
  - pattern: $RESPONSE.set_cookie(..., samesite=$SAMESITE, ...)
  - pattern: $SAMESITE
  - metavariable-regex:
      metavariable: $SAMESITE
      regex: (?!'Lax')
  fix: |
    'Lax'
  message: >-
    Found a Pyramid cookie without the samesite option correctly set.
    Pyramid cookies should be handled securely by setting samesite='Lax' in response.set_cookie(...).
    If this parameter is not properly set, your cookies are not properly protected and
    are at risk of being stolen by an attacker.
  metadata:
    cwe:
    - 'CWE-1275: Sensitive Cookie with Improper SameSite Attribute'
    owasp:
    - A01:2021 - Broken Access Control
    category: security
    technology:
    - pyramid
    references:
    - https://owasp.org/Top10/A01_2021-Broken_Access_Control
    subcategory:
    - vuln
    likelihood: LOW
    impact: LOW
    confidence: MEDIUM
  languages: [python]
  severity: WARNING