CVE-2026-23947

EIP tracks 1 public exploit for CVE-2026-23947. PoCs published by boroeurnprach.

AI-analyzed exploit summary This PoC demonstrates arbitrary code execution in Orval by injecting malicious JavaScript via the `x-enumDescriptions` field in an OpenAPI specification, leading to command execution during client generation.

Orval generates type-safe JS clients (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification. Versions prior to 7.19.0 until 8.0.2 are vulnerable to arbitrary code execution in environments consuming generated clients. This issue is similar in nature to CVE-2026-22785, but affects a different code path in @orval/core that was not addressed by CVE-2026-22785's 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. Orval 7.19.0 and 8.0.2 contain a fix for the issue.