# Eval/Exec Usage
# Detects eval() and exec() which are security risks
id: eval-exec
name: Eval/Exec Usage
severity: warning
category: security
defect_class: injection
inline_tier: blocking
language: python

message: "{{FUNC}}() detected — security risk, code injection vulnerability"

description: |
  eval() and exec() execute arbitrary Python code and are major
  security vulnerabilities when used with untrusted input.
  
  ✅ ALTERNATIVES:
  - ast.literal_eval() for parsing literals
  - json.loads() for JSON
  - Proper parsing libraries for complex needs

query: |
  (call
    function: (identifier) @FUNC
    (#match? @FUNC "^(eval|exec)$")
    arguments: (argument_list) @ARGS)

metavars:
  - FUNC
  - ARGS

tags:
  - security
  - xss
  - injection

examples:
  bad: |
    user_input = "os.system('rm -rf /')"
    eval(user_input)  # DANGEROUS!
  
  good: |
    import ast
    import json
    
    # For literals: use ast.literal_eval
    data = ast.literal_eval("[1, 2, 3]")
    
    # For JSON: use json.loads
    data = json.loads(json_string)

has_fix: false