GHSA-h526-wf6g-67jv

Orval has a code injection via unsanitized x-enum-descriptions in enum generation

Source: GitHub Advisory Database (reviewed) Critical CVE-2026-23947

Packages

Ecosystem	Package	Affected	Fixed in
npm	@orval/core	>= 8.0.0-rc.0, < 8.0.2	8.0.2
npm	@orval/core	< 7.19.0	7.19.0

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact Arbitrary code execution in environments consuming generated clients This issue is similar in nature to the recently-patched MCP vulnerability (CVE-2026-22785), but affects a different code path in @orval/core that was not addressed by that fix. The vulnerability allows untrusted OpenAPI specifications to inject arbitrary TypeScript/JavaScript code into generated clients via the x-enumDescriptions field, which is embedded without proper escaping in getEnumImplementation(). I have confirmed that the injection occurs during const enum generation and results in executable code within the generated schema files. ### Patches Upgrade to Orval 8.0.2 ### References An example OpenAPI showing the issue: ```yaml openapi: 3.0.4 info: title: Enum PoC version: "1.0.0" paths: /ping: get: operationId: ping responses: "200": description: ok content: application/json: schema: $ref: "#/components/schemas/EvilEnum" components: schemas: EvilEnum: type: string enum: - PWNED x-enumDescriptions: - "pwned */ require('child_process').execSync('id'); /*" ```

References

External links from the advisory. They lead to third-party sites.