by Kastro
Paper/Archive/CVE-2026-47428

CVE-2026-47428

vitest-dev vitest — Vitest browser mode serves unsanitized otelCarrier query parameter as inline script

EPSS 0.6%public exploitCVSS 9.6
critical.is priorityof 100
48
CVSS 9.6 (CNA)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 47.7.477 × 209.5Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

Vitest is a testing framework powered by Vite. From 4.0.17 until 4.1.6 and 5.0.0-beta.3, Vitest Browser Mode served /__vitest_test__/ with the otelCarrier query parameter inserted directly into an inline module script, allowing a crafted browser-runner URL to execute arbitrary JavaScript in the Vitest server origin and recover VITEST_API_TOKEN for authenticated API calls. This issue is fixed in versions 4.1.6 and 5.0.0-beta.3.

Affected

ProductAffectedFixed inSource
vitest>= 4.0.17, < 4.1.6–CNA
vitest>= 5.0.0-beta.0, < 5.0.0-beta.3–CNA

Scores by source

GitHub_M (CNA)9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppprefgithub.com/vitest-dev/vitest/pull/10283refgithub.com/vitest-dev/vitest/pull/10285refgithub.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06refgithub.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351faafarefgithub.com/vitest-dev/vitest/releases/tag/v4.1.6refgithub.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3