orval-labs vulnerabilities and threats

CVE-2026-23947 is a critical command injection vulnerability in orval, a tool generating type-safe TypeScript clients from OpenAPI/Swagger specs. Versions prior to 7.19.0 and between 8.0.0-rc.0 and 8.0.2 are affected. The flaw allows untrusted OpenAPI specifications to inject arbitrary JavaScript/TypeScript code via the x-enumDescriptions field, which is embedded without proper escaping during enum generation.

orval generates type-safe JS clients (TypeScript) from any valid OpenAPI v3 or Swagger v2 specification. Prior to 7.18.0, the MCP server generation logic relies on string manipulation that incorporates the summary field from the OpenAPI specification without proper validation or escaping. This allows an attacker to "break out" of the string literal and inject arbitrary code. This vulnerability is fixed in 7.18.0.