CVE-2026-72717: Orval: Import-time RCE via schema default -> zod module-level template literal
Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a ${...} expression or backtick in a schema default is emitted into a module-level template literal emitted by zod schema generation without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts function formatDefaultValue. This issue is fixed in version 8.21.0.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Orvalto a version that resolves this vulnerability.Fixed in 8.21.0
Event History
Frequently Asked Questions
Who is exposed to this issue?
Users of npm/orval versions prior to 8.21.0 are exposed when they generate Zod schemas from an OpenAPI or Swagger specification containing attacker-controlled schema default values and later import the generated schema module. The code can run in developer workstations, CI, test, or application environments.
What must an attacker control to exploit it?
An attacker needs to supply or influence a schema default value in an OpenAPI v3 or Swagger v2 specification. A ${...} expression or backtick in that default can be emitted unsafely into a module-level template literal during Zod schema generation.
When does the injected code execute?
The attacker-controlled JavaScript is evaluated when the generated Zod schema module is imported. Generation alone is not described as the execution point; importing the generated module triggers the risk.
What version fixes the issue?
Upgrade Orval to version 8.21.0, which fixes the unsafe handling in the Zod schema default-value generation path.