CVE-2026-71866 Orval: Import-time RCE via schema property name -> computed-property-key injection in the zod client
Attackers can execute arbitrary code during import by injecting JavaScript into generated Zod schemas via malicious OpenAPI property names.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-71866?
CVE-2026-71866 is a critical code injection vulnerability in orval-labs orval, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. From version 8.19.0 until 8.21.0, a double quote in a schema property name is emitted into the generated zod.object({...}) schema without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated zod schema module is imported, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/zod/src/index.ts and zod object-key generation. This issue is fixed in version 8.21.0.
Which versions are affected by CVE-2026-71866?
2 open source packages ship an affected version, including orval.
| Package | Affected | Fixed in |
|---|---|---|
orval npm | All versions | 8.21.0 |
orval npm | All versions | 8.21.0 |
How do I fix CVE-2026-71866?
Upgrade orval to 8.21.0 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is CVE-2026-71866 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-71866 exists.
Sources
Also known as GHSA-6mr6-jvcr-2f25, ROOT-APP-NPM-CVE-2026-71866.