{"id":"CVE-2026-47428","aliases":["GHSA-2h32-95rg-cppp"],"url":"https://o3.security/vulnerability/CVE-2026-47428","summary":"Vitest browser mode serves unsanitized otelCarrier query parameter as inline script","details":"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.","published":"2026-07-14T19:30:19.670Z","modified":"2026-08-12T03:51:18.551170398Z","cvss":{"score":9.6,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H"},"epss":{"score":0.00388,"percentile":0.32178,"asOf":"2026-08-20"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"@vitest/browser","fixedVersion":"4.1.6"},{"ecosystem":"npm","name":"@vitest/browser","fixedVersion":"5.0.0-beta.3"}],"fix":{"url":"https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06","label":"vitest-dev/vitest@18af98c"},"references":[{"type":"WEB","url":"https://github.com/vitest-dev/vitest/releases/tag/v4.1.6"},{"type":"WEB","url":"https://github.com/vitest-dev/vitest/releases/tag/v5.0.0-beta.3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/47xxx/CVE-2026-47428.json"},{"type":"ADVISORY","url":"https://github.com/vitest-dev/vitest/security/advisories/GHSA-2h32-95rg-cppp"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47428"},{"type":"FIX","url":"https://github.com/vitest-dev/vitest/commit/18af98cee1830604d57f6a02bf28f8067cdffc06"},{"type":"FIX","url":"https://github.com/vitest-dev/vitest/commit/3514f9fa135c90e1c35754fc4d27c9cf351faafa"},{"type":"FIX","url":"https://github.com/vitest-dev/vitest/pull/10283"},{"type":"FIX","url":"https://github.com/vitest-dev/vitest/pull/10285"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:18.551170398Z"}}