CVE-2026-96759: Orval-Labs Orval

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

orval before 8.29.0 fails to escape the operationId parameter when emitting it into generated TanStack Query mutator options metadata objects. Attackers can inject arbitrary JavaScript code through a crafted operationId in an OpenAPI specification that executes when generated hooks are called.

Affected products

• Orval-Labs Orval: before 8.29.0 (fixed in 8.29.0)

Published 2026-09-23. Last modified 2026-09-29.