# Vitest: Code injection via unauthenticated manual mock registration

Advisory record · `GHSA-qxg6-89mg-rqv8`

- **Identifiers:** `GHSA-qxg6-89mg-rqv8` · `CVE-2026-112949`
- **State:** Confirmed
- **Severity:** CVSS 4.7 Medium
- **Critical:** No
- **Weakness (CWE):** [CWE-94](https://cwe.mitre.org/data/definitions/94.html) · [CWE-116](https://cwe.mitre.org/data/definitions/116.html) · [CWE-306](https://cwe.mitre.org/data/definitions/306.html)
- **Tags:** [Code injection](https://agentprime.io/advisories/tag/code-injection.md) · [Authentication bypass](https://agentprime.io/advisories/tag/auth-bypass.md) · [CWE-116](https://agentprime.io/advisories/tag/cwe-116.md)
- **Published:** 21 Oct 2026
- **Updated:** 21 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 21 Oct 2026, 19:54 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `@vitest/mocker` (npm): affected `>=2.1.0-beta.7, <4.1.12 || >=5.0.0-beta.1, <5.0.3`; fixed in `4.1.12`, `5.0.3`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 4.7 Medium, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0034, the 27th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 13:33 UTC: First seen by agentprime
- 31 Oct 2026, 13:33 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-qxg6-89mg-rqv8)

## Sources

- [GitHub Advisory Database: GHSA-qxg6-89mg-rqv8](https://github.com/advisories/GHSA-qxg6-89mg-rqv8)
- [OSV: GHSA-qxg6-89mg-rqv8](https://osv.dev/vulnerability/GHSA-qxg6-89mg-rqv8)
- <https://github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-112949>
- <https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35>
- <https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473>
- <https://github.com/vitest-dev/vitest>
- <https://github.com/vitest-dev/vitest/releases/tag/v4.1.12>
- <https://github.com/vitest-dev/vitest/releases/tag/v5.0.3>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-qxg6-89mg-rqv8>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-qxg6-89mg-rqv8/>. Everything for agents: <https://agentprime.io/llms.txt>.