mcp-server-semgrep/semgrep-rules/java/java-jwt/security/jwt-hardcode.yaml

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: java-jwt-hardcoded-secret
  message: >-
    A hard-coded credential was detected. It is not recommended to store credentials in source-code,
    as this risks secrets
    being leaked and used by either an internal or external malicious adversary. It is recommended to
    use environment variables to securely provide credentials or retrieve credentials from a secure
    vault or HSM (Hardware Security Module).
  metadata:
    cwe:
    - 'CWE-798: Use of Hard-coded Credentials'
    references:
    - https://cheatsheetseries.owasp.org/cheatsheets/Secrets_Management_Cheat_Sheet.html
    owasp:
    - A07:2021 - Identification and Authentication Failures
    technology:
    - java
    - secrets
    - jwt
    category: security
    cwe2022-top25: true
    cwe2021-top25: true
    subcategory:
    - vuln
    likelihood: LOW
    impact: MEDIUM
    confidence: HIGH
  languages: [java]
  severity: WARNING
  patterns:
  - pattern-either:
    - pattern: |
        (Algorithm $ALG) = $ALGO.$HMAC("$Y");
    - pattern: |
        $SECRET = "$Y";
        ...
        (Algorithm $ALG) = $ALGO.$HMAC($SECRET);
    - pattern: |
        class $CLASS {
          ...
          $TYPE $SECRET = "$Y";
          ...
          $RETURNTYPE $FUNC (...) {
            ...
            (Algorithm $ALG) = $ALGO.$HMAC($SECRET);
            ...
          }
          ...
        }
  - focus-metavariable: $Y
  - metavariable-regex:
      metavariable: $HMAC
      regex: (HMAC384|HMAC256|HMAC512)