Get a Demo

Let's Patch It!

Book a short call with one our specialists, we'll walk you through how Endor Patches work, and ask you a few questions about your environment (like your primary programming languages and repository management). We'll also send you an email right after you fill out the form, feel free to reply with any questions you have in advance!

CVE

CVE-2026-47428

Vitest browser mode serves unsanitized otelCarrier query parameter as inline script
Back to all
CVE

CVE-2026-47428

Vitest browser mode serves unsanitized otelCarrier query parameter as inline script

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 /_vitesttest_/ 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 VITESTAPI_TOKEN for authenticated API calls. This issue is fixed in versions 4.1.6 and 5.0.0-beta.3.

Package Versions Affected

Package Version
patch Availability
No items found.

Automatically patch vulnerabilities without upgrading

Fix Without Upgrading
Detect compatible fix
Apply safe remediation
Fix with a single pull request

CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
C
H
U
9.6
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Related Resources

No items found.

References

https://github.com/vitest-dev/vitest/releases/tag/v4.1.6, https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47428.json, https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp, https://nvd.nist.gov/vuln/detail/CVE-2026-47428, https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06, https://github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351faafa, https://github.com/vitest-dev/vitest/pull/10283, https://github.com/vitest-dev/vitest/pull/10285

Severity

9.6

CVSS Score
0
10

Basic Information

Base CVSS
9.6
EPSS Probability
0.00613%
EPSS Percentile
0.46897%
Introduced Version
0
Fix Available
3514f9fa135c90e1c35754fc4d27c9cf351faafa

Fix Critical Vulnerabilities Instantly

Secure your app without upgrading.
Fix Without Upgrading