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CVE-2026-47428

CVE-2026-47428 · Vitest browser mode serves unsanitized otelCarrier query parameter as inline script

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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 9.6 · Critical · EPSS 0.6% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • vitest

    Versions
    • >= 4.0.17, < 4.1.6: Affected
    • >= 5.0.0-beta.0, < 5.0.0-beta.3: Affected

    No fix published

  • @vitest/browser npm

    Affected ranges
    • SEMVER: ≥ 4.0.17, < 4.1.6

    Update to 4.1.6

  • @vitest/browser npm

    Affected ranges
    • SEMVER: ≥ 5.0.0-beta.0, < 5.0.0-beta.3

    Update to 5.0.0-beta.3

Original sources

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