Orval Mock Generation Code Injection via const

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

7.7 · CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N · score source

EPSS

• CVE-2026-24132: 0.74% estimated exploitation activity in the next 30 days; percentile 54.75 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

I am reporting a code injection vulnerability in Orval’s mock generation pipeline affecting @orval/mock in both the 7.x and 8.x series. This issue is related in impact to the previously reported enum x-enumDescriptions (https://github.com/advisories/GHSA-h526-wf6g-67jv), but it affects a different code path in the faker-based mock generator rather than @orval/core. The vulnerability allows untrusted OpenAPI specifications to inject arbitrary TypeScript/JavaScript into generated mock files via the const keyword on schema properties. These const values are interpolated into the mock scalar generator (getMockScalar in packages/mock/src/faker/getters/scalar.ts) without proper escaping or type-safe serialization, which results in attacker-controlled code being emitted into both interface definitions and faker/MSW handlers. I have confirmed that this occurs on orval@7.19.0 and orval@8.0.2 with mock: true, and that the generated mocks contain executable payloads such as…

Published by the source

22 Jan 2026, 18:09 UTC

Last modified by the source

28 Feb 2026, 06:27 UTC

Source last checked

26 Oct 2026, 12:42 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-f456-rf33-4626

2. Revision 2 · amended · 24 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-f456-rf33-4626

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# Patch Next advisory brief: CVE-2026-24132

Advisory: Orval Mock Generation Code Injection via const
IDs: CVE-2026-24132, GHSA-f456-rf33-4626
Record: https://patchnext.com/advisories/cve-2026-24132 (revision 3, source checked 26 Oct 2026, 12:42 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.7)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: @orval/mock 8.0.3, 7.20.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm @orval/mock: affected < 7.20.0; >= 8.0.0-rc.0, < 8.0.3; fixed in 7.20.0, 8.0.3

## Suggested inspection (read-only)
- `npm ls @orval/mock --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on @orval/mock.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-f456-rf33-4626 (OSV record GHSA-f456-rf33-4626 lists affected ranges: npm @orval/mock >=0 =8.0.0-rc.0 <8.0.3 (fixed))
- Verified: https://github.com/advisories/GHSA-f456-rf33-4626 (GitHub-reviewed advisory GHSA-f456-rf33-4626 lists affected ranges: npm @orval/mock >=0 =8.0.0-rc.0 <8.0.3)

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