CVE-2026-24132: Orval

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

Orval generates type-safe JS clients (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification. Versions 7.19.0 and below and 8.0.0-rc.0 through 8.0.2 allow 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. The vulnerability is similar in impact to the previously reported enum x-enumDescriptions (GHSA-h526-wf6g-67jv), but it affects a different code path in the faker-based mock generator rather than @orval/core. The issue has been fixed in versions 7.20.0 and 8.0.3.

Affected products

• Orval Orval: from 6.0.0, before 7.20.0 (fixed in 7.20.0); from 8.0.0, before 8.0.3 (fixed in 8.0.3)

Published 2026-01-23. Last modified 2026-06-17.