Components Response Definition Is Unused

• Query id: 9c3ea128-7e9a-4b4c-8a32-75ad17a2d3ae
• Query name: Components Response Definition Is Unused
• Platform: OpenAPI
• Severity: Info
• Category: Best Practices
• CWE: 710
• URL: Github

Description

Components responses definitions should be referenced or removed from Open API definition
Documentation

Code samples

Code samples with security vulnerabilities

Positive test num. 1 - json file

{
  "openapi": "3.0.0",
  "info": {
    "title": "Simple API Overview",
    "version": "1.0.0"
  },
  "paths": {
    "/": {
      "get": {
        "operationId": "listVersionsv2",
        "summary": "List API versions",
        "responses": {
          "200": {
            "$ref": "#/components/schemas/MyObject"
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "Error": {
        "type": "object",
        "properties": {
          "code": {
            "type": "string"
          },
          "message": {
            "type": "string"
          },
          "required": [
            "code",
            "message"
          ]
        }
      },
      "MyObject": {
        "type": "object",
        "properties": {
          "id": {
            "type": "string"
          },
          "name": {
            "type": "string"
          }
        }
      }
    },
    "responses": {
      "NotFound": {
        "description": "Resource not found",
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/Error"
            }
          }
        }
      }
    }
  }
}

Positive test num. 2 - yaml file

openapi: 3.0.0
info:
  title: Simple API Overview
  version: 1.0.0
paths:
  "/":
    get:
      operationId: listVersionsv2
      summary: List API versions
      responses:
        '200':
          "$ref": "#/components/schemas/MyObject"
components:
  schemas:
    Error:
      type: object
      properties:
        code:
          type: string
        message:
          type: string
        required:
        - code
        - message
    MyObject:
      type: object
      properties:
        id:
          type: string
        name:
          type: string
  responses:
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            "$ref": "#/components/schemas/Error"

Code samples without security vulnerabilities

Negative test num. 1 - json file

{
  "openapi": "3.0.0",
  "info": {
    "title": "Simple API Overview",
    "version": "1.0.0"
  },
  "paths": {
    "/": {
      "get": {
        "operationId": "listVersionsv2",
        "summary": "List API versions",
        "responses": {
          "404": {
            "$ref": "#/components/responses/NotFound"
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "Error": {
        "type": "object",
        "properties": {
          "code": {
            "type": "string"
          },
          "message": {
            "type": "string"
          },
          "required": [
            "code",
            "message"
          ]
        }
      }
    },
    "responses": {
      "NotFound": {
        "description": "Resource not found",
        "content": {
          "application/json": {
            "schema": {
              "$ref": "#/components/schemas/Error"
            }
          }
        }
      }
    }
  }
}

Negative test num. 2 - yaml file

openapi: 3.0.0
info:
  title: Simple API Overview
  version: 1.0.0
paths:
  "/":
    get:
      operationId: listVersionsv2
      summary: List API versions
      responses:
        '404':
          "$ref": "#/components/responses/NotFound"
components:
  schemas:
    Error:
      type: object
      properties:
        code:
          type: string
        message:
          type: string
        required:
        - code
        - message
  responses:
    NotFound:
      description: Resource not found
      content:
        application/json:
          schema:
            "$ref": "#/components/schemas/Error"