mcp-server-semgrep/semgrep-rules/ruby/jwt/security/audit/jwt-exposed-data.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: ruby-jwt-exposed-data
  message: >-
    The object is passed strictly to jsonwebtoken.sign(...)
    Make sure that sensitive information is not exposed through JWT token payload.
  severity: WARNING
  metadata:
    owasp:
    - A02:2017 - Broken Authentication
    - A04:2021 - Insecure Design
    cwe:
    - 'CWE-522: Insufficiently Protected Credentials'
    source-rule-url: https://semgrep.dev/blog/2020/hardcoded-secrets-unverified-tokens-and-other-common-jwt-mistakes/
    category: security
    technology:
    - jwt
    references:
    - https://owasp.org/Top10/A04_2021-Insecure_Design
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: LOW
    confidence: LOW
  languages: [ruby]
  patterns:
  - pattern-inside: |
      require 'jwt'
      ...
  - pattern-inside: |
      def $FUNC(...,$INPUT,...)
        ...
      end
  - pattern: |
      JWT.encode($INPUT,...)