Vitest: Code injection via unauthenticated manual mock registration

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

• 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

1. 31 Oct 2026, 13:33 UTC First seen by agentprime
2. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-qxg6-89mg-rqv8
• OSV: GHSA-qxg6-89mg-rqv8
• github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8
• nvd.nist.gov/vuln/detail/CVE-2026-112949
• github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35
• github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473
• github.com/vitest-dev/vitest
• github.com/vitest-dev/vitest/releases/tag/v4.1.12
• 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.