# CVE-2026-71866

## Summary

- **CVE ID:** CVE-2026-71866
- **Severity:** CRITICAL
- **CVSS Score:** 9.3 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-89, CWE-95
- **Published:** Aug 19, 2026
- **Last Modified:** Aug 19, 2026

## 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.

## Affected Products

- orval-labs — orval (< 8.21.0)

## References

- [CNA](https://github.com/orval-labs/orval/security/advisories/GHSA-6mr6-jvcr-2f25)
- [CNA](https://github.com/orval-labs/orval/pull/3692)
- [CNA](https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6)
- [CNA](https://github.com/orval-labs/orval/releases/tag/v8.21.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.48%
- **EPSS Percentile:** 39.8

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._