mcp-server-semgrep/semgrep-rules/python/jwt/security/jwt-exposed-credentials.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: jwt-python-exposed-credentials
  languages:
  - python
  metadata:
    cwe:
    - 'CWE-522: Insufficiently Protected Credentials'
    owasp:
    - A02:2017 - Broken Authentication
    - A04:2021 - Insecure Design
    source-rule-url: https://semgrep.dev/blog/2020/hardcoded-secrets-unverified-tokens-and-other-common-jwt-mistakes/
    references:
    - https://cwe.mitre.org/data/definitions/522.html
    category: security
    technology:
    - jwt
    cwe2021-top25: true
    subcategory:
    - audit
    likelihood: LOW
    impact: MEDIUM
    confidence: LOW
  message: >-
    Password is exposed through JWT token payload. This is not encrypted and
    the password could be compromised. Do not store passwords in JWT tokens.
  pattern-either:
  - pattern: |
      jwt.encode({...,"password":$P,...},...)
  - pattern: |
      $PAYLOAD = {...,"password":$P,...}
      ...
      jwt.encode($PAYLOAD,...)
  severity: ERROR