Vulnerability details
CVE-2026-47428
vitest-dev vitest
Vitest browser mode serves unsanitized otelCarrier query parameter as inline script
CVSS 3.1
9.6Critical
Official 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.
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 9.6Critical | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| vitest-dev | vitest | >= 4.0.17, < 4.1.6 | CVEProject cvelistV5 (CNA) |
| vitest-dev | vitest | >= 5.0.0-beta.0, < 5.0.0-beta.3 | CVEProject cvelistV5 (CNA) |
References and advisories
7- https://github.com/vitest-dev/vitest/pull/10283 x_refsource_MISC
- https://github.com/vitest-dev/vitest/pull/10285 x_refsource_MISC
- https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06 x_refsource_MISC
- https://github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351faafa x_refsource_MISC
- https://github.com/vitest-dev/vitest/releases/tag/v4.1.6 x_refsource_MISC
- https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3 x_refsource_MISC
- https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp x_refsource_CONFIRM
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Details
- Published
- 2026-07-14
- Last updated
- 2026-07-15
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
0.58%
Probability of exploitation in 30 days
47.8%
Percentile (among all CVEs)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- Proof of concept
- Technical impact
- Total
Weaknesses (CWE)
- CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')