CVE-2026-47428 Details
Description
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.
A critical cross-site scripting vulnerability has been identified in Vitest, a testing framework powered by Vite. This issue affects Vitest versions 4.0.17 prior to 4.1.6 and 5.0.0-beta.3. The vulnerability arises in Vitest Browser Mode, where the 'otelCarrier' query parameter is unsanitized and directly injected into an inline module script. This flaw allows a crafted browser-runner URL to execute arbitrary JavaScript in the Vitest server origin, potentially leading to the theft of the 'VITEST_API_TOKEN', which is used for authenticated API calls. Exploitation of this vulnerability can be chained with server-side code execution by writing a payload into 'vite.config.ts', which is then executed in Node when the config is reloaded.
Users can upgrade to Vitest versions 4.1.6 or 5.0.0-beta.3 to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jul 14, 2026CISA-ADP
Assessed Jul 15, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06 | [email protected] | Source CodeVendor |
| https://github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351faafa | [email protected] | Source CodeVendor |
| https://github.com/vitest-dev/vitest/pull/10283 | [email protected] | Issue TrackingVendor |
| https://github.com/vitest-dev/vitest/pull/10285 | [email protected] | Issue TrackingVendor |
| https://github.com/vitest-dev/vitest/releases/tag/v4.1.6 | [email protected] | Release NotesVendor |
| https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3 | [email protected] | Release NotesVendor |
| https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Vitest | >= 4.0.17, < 4.1.6 (semver) >= 5.0.0-beta.0, < 5.0.0-beta.3 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 15, 2026 | CVE Modified | CISA-ADP |
| Jul 14, 2026 | New CVE Received | [email protected] |