CVE-2026-96757: orval before 8.29.0 fails to escape OpenAPI media-type keys when emitting them into single-quoted Content-Type string literals in generated

Executive brief

orval before 8.29.0 fails to escape OpenAPI media-type keys when emitting them into single-quoted Content-Type string literals in generated code. Attackers can inject JavaScript through crafted media-type keys in OpenAPI specifications that executes when generated fetch operations or mock resolvers are invoked.

References

• https://github.com/orval-labs/orval
• https://github.com/orval-labs/orval/blob/v8.28.1/packages/fetch/src/index.ts