---
id: CVE-2026-71867
title: >-
  Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and
  Swagger v2 specifications
summary: >-
  Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and
  Swagger v2 specifications. Prior to 8.21.0, a single quote in a schema
  property name is emitted into single-quoted object keys in generated MSW mock
  factories…
severity: critical
cwe:
  - CWE-89
  - CWE-95
vendor: orval
product: orval
affected:
  - orval < 8.21.0
patched:
  - orval 8.21.0
published: '2026-08-19'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:20:38.860'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71867'
references:
  - url: >-
      https://github.com/orval-labs/orval/commit/8ef1bfdf3f9bcaf9dabfbe2e42887f1c0e159ab6
    label: security-advisories@github.com
  - url: 'https://github.com/orval-labs/orval/pull/3692'
    label: security-advisories@github.com
  - url: 'https://github.com/orval-labs/orval/releases/tag/v8.21.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/orval-labs/orval/security/advisories/GHSA-2w86-xfrc-g85r
    label: security-advisories@github.com
  - url: >-
      https://github.com/orval-labs/orval/security/advisories/GHSA-2w86-xfrc-g85r
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-71867'
  - url: 'https://github.com/advisories/GHSA-2w86-xfrc-g85r'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00607
epssPercentile: 0.47768
aliases:
  - GHSA-2w86-xfrc-g85r
ecosystem: npm
ingestedAt: '2026-09-03T19:07:26.165Z'
---

## Overview

Orval generates type-safe JavaScript clients in TypeScript from OpenAPI v3 and Swagger v2 specifications. Prior to 8.21.0, a single quote in a schema property name is emitted into single-quoted object keys in generated MSW mock factories without safe encoding. This permits attacker-controlled JavaScript to be evaluated when the generated mock factory is called by tests or an MSW handler, resulting in code execution in the developer, CI, test, or application environment. The affected code is packages/core/src/getters/keys.ts function getKey and MSW mock generation. This issue is fixed in version 8.21.0.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-71867)

Affected packages:

- `orval < 8.21.0`

Patched in:

- `orval 8.21.0`

Source: https://github.com/advisories/GHSA-2w86-xfrc-g85r