CVE-2026-47429
Vitest on Windows allows path traversal and API abuse to read files and execute scripts.
Is CVE-2026-47429 being exploited?
Not confirmed. CVE-2026-47429 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.92% probability of exploitation in the next 30 days.
How severe is CVE-2026-47429?
CVE-2026-47429 is rated Critical with a CVSS score of 9.8. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-47429?
Yes. A fix has been recorded for CVE-2026-47429. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-47429 affect?
CVE-2026-47429 affects Vitest < 3.2.5 (Windows), Vitest < 4.1.0 (Windows), Deployments exposing Vitest UI/API. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-47429?
Upgrade to Vitest 3.2.5 or 4.1.0 and restrict UI/API access until patched.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Windows Vitest UI/API allows \?\..\ path traversal to read arbitrary files and API write/rerun features can enable arbitrary script execution.
Immediate action required
- affected< 3.2.5
- affected>= 4.0.0 and < 4.1.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.