CVE-2026-24132
Orval Mock Generation Code Injection via const
Impact
I am reporting a code injection vulnerability in Orval’s mock generation pipeline affecting @orval/mock in both the 7.x and 8.x series. This issue is related in impact to the previously reported enum x-enumDescriptions (https://github.com/advisories/GHSA-h526-wf6g-67jv), but it affects a different code path in the faker-based mock generator rather than @orval/core. The vulnerability allows untrusted OpenAPI specifications to inject arbitrary TypeScript/JavaScript into generated mock files via the const keyword on schema properties. These const values are interpolated into the mock scalar generator (getMockScalar in packages/mock/src/faker/getters/scalar.ts) without proper escaping or type-safe serialization, which results in attacker-controlled code being emitted into both interface definitions and faker/MSW handlers. I have confirmed that this occurs on orval@7.19.0 and orval@8.0.2 with mock: true, and that the generated mocks contain executable payloads such as require('child_process').execSync('id') in the output TypeScript. ```yaml openapi: 3.1.0 info: title: Mock Const Injection PoC version: 1.0.0 paths: /test: get: operationId: getTests responses: '200': description: OK content: application/json: schema: $ref: '#/components/schemas/Tests' components: schemas: Tests: type: object properties: EvilString: type: string const: "'); require('child_process').execSync('id'); //" EvilNumber: type: number const: "0); require('child_process').execSync('id'); //" SafeEnum: type: string enum: ["test"] ```
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | @orval/mock | < 7.20.0 | 7.20.0 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Orval | Orval | from 6.0.0 before 7.20.0 from 8.0.0 before 8.0.3 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/orval-labs/orval/commit/44ca8c1f5f930a3e4cefb6b79b38bcde7f8532a5
- https://github.com/orval-labs/orval/commit/6d8ece07ccb80693ad43edabccb3957aceadcd06
- https://github.com/orval-labs/orval/commit/9b211cddc9f009f8a671e4ac5c6cb72cd8646b62
- https://github.com/orval-labs/orval/pull/2828
- https://github.com/orval-labs/orval/pull/2829
- https://github.com/orval-labs/orval/pull/2830
- https://github.com/orval-labs/orval/releases/tag/v7.20.0
- https://github.com/orval-labs/orval/releases/tag/v8.0.3
- https://github.com/orval-labs/orval/security/advisories/GHSA-f456-rf33-4626
- https://github.com/advisories/GHSA-f456-rf33-4626
- https://nvd.nist.gov/vuln/detail/CVE-2026-24132