Property 'explode' of Encoding Object Ignored

  • Query id: a4dd69b8-49fa-45d2-a060-c76655405b05
  • Query name: Property 'explode' of Encoding Object Ignored
  • Platform: OpenAPI
  • Severity: Info
  • Category: Best Practices
  • URL: Github

Description

Property 'explode' of the encoding object should be defined when the media type of the request body is 'application/x-www-form-urlencoded'. If not, it will be ignored.
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": {
            "description": "200 response",
            "content": {
              "application/json": {
                "examples": {
                  "foo": {
                    "value": {
                      "versions": [
                        {
                          "links": [
                            {
                              "href": "http://127.0.0.1:8774/v2/",
                              "rel": "self"
                            }
                          ],
                          "status": "CURRENT",
                          "updated": "2011-01-21T11:33:21Z",
                          "id": "v2.0"
                        }
                      ]
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "requestBodies": {
      "NewItem": {
        "description": "A JSON object containing item data",
        "required": true,
        "content": {
          "multipart/data": {
            "schema": {
              "type": "object",
              "properties": {
                "code": {
                  "type": "string",
                  "format": "binary"
                }
              }
            },
            "examples": {
              "tshirt": {
                "$ref": "#/components/examples/tshirt"
              }
            },
            "encoding": {
              "code": {
                "contentType": "image/png, image/jpeg",
                "explode": true
              }
            }
          }
        }
      }
    }
  }
}
Positive test num. 2 - 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": {
            "description": "200 response",
            "content": {
              "application/json": {
                "encoding": {
                  "code": {
                    "contentType": "image/png, image/jpeg"
                  }
                },
                "schema": {
                  "properties": {
                    "code": {
                      "type": "string",
                      "format": "binary"
                    },
                    "message": {
                      "type": "string"
                    }
                  },
                  "type": "object",
                  "discriminator": {
                    "propertyName": "petType"
                  }
                }
              }
            }
          }
        },
        "requestBody": {
          "content": {
            "multipart/form-data": {
              "schema": {
                "type": "string",
                "format": "binary",
                "properties": {
                  "code": {
                    "type": "string",
                    "format": "binary"
                  }
                }
              },
              "encoding": {
                "code": {
                  "contentType": "image/png, image/jpeg",
                  "explode": true
                }
              }
            }
          }
        }
      }
    }
  }
}
Positive test num. 3 - 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":
          description: 200 response
          content:
            application/json:
              examples:
                foo:
                  value:
                    versions:
                      - status: CURRENT
                        updated: "2011-01-21T11:33:21Z"
                        id: v2.0
                        links:
                          - href: http://127.0.0.1:8774/v2/
                            rel: self
components:
  requestBodies:
    NewItem:
      description: A JSON object containing item data
      required: true
      content:
        multipart/form-data:
          schema:
            type: object
            properties:
              code:
                type: string
                format: binary
          examples:
            tshirt:
              $ref: "#/components/examples/tshirt"
          encoding:
            code:
              contentType: image/png, image/jpeg
              explode: true

Positive test num. 4 - 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":
          description: 200 response
          content:
            application/json:
              schema:
                type: object
                discriminator:
                  propertyName: petType
                properties:
                  code:
                    type: string
                    format: binary
                  message:
                    type: string
              encoding:
                code:
                  contentType: image/png, image/jpeg
      requestBody:
        content:
          multipart/form-data:
            schema:
              type: string
              format: binary
              properties:
                code:
                  type: string
                  format: binary
            encoding:
              code:
                contentType: image/png, image/jpeg
                explode: true

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": {
          "200": {
            "description": "200 response",
            "content": {
              "application/json": {
                "examples": {
                  "foo": {
                    "value": {
                      "versions": [
                        {
                          "links": [
                            {
                              "href": "http://127.0.0.1:8774/v2/",
                              "rel": "self"
                            }
                          ],
                          "status": "CURRENT",
                          "updated": "2011-01-21T11:33:21Z",
                          "id": "v2.0"
                        }
                      ]
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "components": {
    "requestBodies": {
      "NewItem": {
        "description": "A JSON object containing item data",
        "required": true,
        "content": {
          "application/x-www-form-urlencoded": {
            "schema": {
              "type": "object",
              "properties": {
                "code": {
                  "type": "string",
                  "format": "binary"
                }
              }
            },
            "examples": {
              "tshirt": {
                "$ref": "#/components/examples/tshirt"
              }
            },
            "encoding": {
              "code": {
                "contentType": "image/png, image/jpeg",
                "explode": true
              }
            }
          }
        }
      }
    }
  }
}
Negative test num. 2 - 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": {
            "description": "200 response",
            "content": {
              "application/json": {
                "encoding": {
                  "code": {
                    "contentType": "image/png, image/jpeg"
                  }
                },
                "schema": {
                  "properties": {
                    "code": {
                      "type": "string",
                      "format": "binary"
                    },
                    "message": {
                      "type": "string"
                    }
                  },
                  "type": "object",
                  "discriminator": {
                    "propertyName": "petType"
                  }
                }
              }
            }
          }
        },
        "requestBody": {
          "content": {
            "application/x-www-form-urlencoded": {
              "schema": {
                "type": "string",
                "format": "binary",
                "properties": {
                  "code": {
                    "type": "string",
                    "format": "binary"
                  }
                }
              },
              "encoding": {
                "code": {
                  "contentType": "image/png, image/jpeg",
                  "explode": true
                }
              }
            }
          }
        }
      }
    }
  }
}
Negative test num. 3 - 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":
          description: 200 response
          content:
            application/json:
              examples:
                foo:
                  value:
                    versions:
                      - status: CURRENT
                        updated: "2011-01-21T11:33:21Z"
                        id: v2.0
                        links:
                          - href: http://127.0.0.1:8774/v2/
                            rel: self
components:
  requestBodies:
    NewItem:
      description: A JSON object containing item data
      required: true
      content:
        application/x-www-form-urlencoded:
          schema:
            type: object
            properties:
              code:
                type: string
                format: binary
          examples:
            tshirt:
              $ref: "#/components/examples/tshirt"
          encoding:
            code:
              contentType: image/png, image/jpeg
              explode: true

Negative test num. 4 - 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":
          description: 200 response
          content:
            application/json:
              schema:
                type: object
                discriminator:
                  propertyName: petType
                properties:
                  code:
                    type: string
                    format: binary
                  message:
                    type: string
              encoding:
                code:
                  contentType: image/png, image/jpeg
      requestBody:
        content:
          application/x-www-form-urlencoded:
            schema:
              type: string
              format: binary
              properties:
                code:
                  type: string
                  format: binary
            encoding:
              code:
                contentType: image/png, image/jpeg
                explode: true