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

MCP Server for Semgrep Integration - static code analysis with AI

rules:
- id: jwt-scala-hardcode
  patterns:
  - pattern-inside: |
      import pdi.jwt.$DEPS
      ...
  - pattern-either:
    - pattern: $JWT.encode($X, "...", ...)
    - pattern: $JWT.decode($X, "...", ...)
    - pattern: $JWT.decodeRawAll($X, "...", ...)
    - pattern: $JWT.decodeRaw($X, "...", ...)
    - pattern: $JWT.decodeAll($X, "...", ...)
    - pattern: $JWT.validate($X, "...", ...)
    - pattern: $JWT.isValid($X, "...", ...)
    - pattern: $JWT.decodeJson($X, "...", ...)
    - pattern: $JWT.decodeJsonAll($X, "...", ...)
    - patterns:
      - pattern-either:
        - pattern: $JWT.encode($X, $KEY, ...)
        - pattern: $JWT.decode($X, $KEY, ...)
        - pattern: $JWT.decodeRawAll($X, $KEY, ...)
        - pattern: $JWT.decodeRaw($X, $KEY, ...)
        - pattern: $JWT.decodeAll($X, $KEY, ...)
        - pattern: $JWT.validate($X, $KEY, ...)
        - pattern: $JWT.isValid($X, $KEY, ...)
        - pattern: $JWT.decodeJson($X, $KEY, ...)
        - pattern: $JWT.decodeJsonAll($X, $KEY, ...)
        - pattern: $JWT.encode($X, this.$KEY, ...)
        - pattern: $JWT.decode($X, this.$KEY, ...)
        - pattern: $JWT.decodeRawAll($X, this.$KEY, ...)
        - pattern: $JWT.decodeRaw($X, this.$KEY, ...)
        - pattern: $JWT.decodeAll($X, this.$KEY, ...)
        - pattern: $JWT.validate($X, this.$KEY, ...)
        - pattern: $JWT.isValid($X, this.$KEY, ...)
        - pattern: $JWT.decodeJson($X, this.$KEY, ...)
        - pattern: $JWT.decodeJsonAll($X, this.$KEY, ...)
      - pattern-either:
        - pattern-inside: |
            class $CL {
              ...
              $KEY = "..."
              ...
            }
        - pattern-inside: |
            object $CL {
              ...
              $KEY = "..."
              ...
            }
  - metavariable-pattern:
      metavariable: $JWT
      patterns:
      - pattern-either:
        - pattern: Jwt
        - pattern: JwtArgonaut
        - pattern: JwtCirce
        - pattern: JwtJson4s
        - pattern: JwtJson
        - pattern: JwtUpickle
  message: >-
    Hardcoded JWT secret or private key is used.
    This is a Insufficiently Protected Credentials weakness: https://cwe.mitre.org/data/definitions/522.html
    Consider using an appropriate security mechanism to protect the credentials (e.g. keeping secrets
    in environment variables)
  languages: [scala]
  severity: WARNING
  metadata:
    references:
    - https://jwt-scala.github.io/jwt-scala/
    category: security
    cwe:
    - 'CWE-522: Insufficiently Protected Credentials'
    owasp:
    - A02:2017 - Broken Authentication
    - A04:2021 - Insecure Design
    technology:
    - scala
    confidence: HIGH
    cwe2021-top25: true
    subcategory:
    - vuln
    likelihood: MEDIUM
    impact: MEDIUM