Vulnerability Description
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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Orval | Orval | < 7.19.0 |
Related Weaknesses (CWE)
References
- https://github.com/orval-labs/orval/releases/tag/v8.0.2ProductRelease Notes
- https://github.com/orval-labs/orval/security/advisories/GHSA-h526-wf6g-67jvVendor Advisory
FAQ
What is CVE-2026-23947?
CVE-2026-23947 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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...
How severe is CVE-2026-23947?
CVE-2026-23947 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-23947?
Check the references section above for vendor advisories and patch information. Affected products include: Orval Orval.