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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| vitest-dev | vitest | >= 4.0.17, < 4.1.6, >= 5.0.0-beta.0, < 5.0.0-beta.3 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Red Hat Hardened Images 1 | prometheus3.13 | 3.13.1-0.1.hum1 | RHSA-2026:39058 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| npm | @vitest/browser | >= 4.0.17, < 4.1.6 | 4.1.6 | GHSA-2h32-95rg-cppp |
| npm | @vitest/browser | >= 5.0.0-beta.0, < 5.0.0-beta.3 | 5.0.0-beta.3 | GHSA-2h32-95rg-cppp |
Advisories 1
- RHSA-2026:39058 Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update Red Hat Security Advisories (RHSA) · Sep 8, 2026
References
- https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp
- https://github.com/vitest-dev/vitest/pull/10283
- https://github.com/vitest-dev/vitest/pull/10285
- https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06
- https://github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351faafa
- https://github.com/vitest-dev/vitest/releases/tag/v4.1.6
- https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3