Is @vitest/browser affected by CVE-2026-47428?

npm @vitest/browser is affected in >=4.0.17 =5.0.0-beta.0 <5.0.0-beta.3.

Is CVE-2026-47428 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

critical

CVE-2026-47428

Q: Is CVE-2026-47428 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.6%.

npm · @vitest/browser

Summary

Vitest browser mode serves unsanitized otelCarrier query parameter as inline script

Severity: critical
EPSS: 0.6% (p47)
Also known as: GHSA-2h32-95rg-cppp
Published: 2026-06-01

References

https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp
https://github.com/vitest-dev/vitest
https://github.com/vitest-dev/vitest/blob/cba2036a197ec8ed42c35a37db78ef07192202c7/packages/browser/src/client/public/esm-client-injector.js#L41

Related advisories

GHSA-p63j-vcc4-9vmv — critical · npm/@vitest/browser
CVE-2026-53633 — critical · npm/@vitest/browser

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.