{"id":"CVE-2026-112949","published":"2026-10-20T16:17:05.660","lastModified":"2026-10-23T02:16:54.907","description":"Vitest is a Vite-native testing framework for JavaScript and TypeScript projects. From 2.1.0-beta.7 until 4.1.12 and 5.0.3, an unauthenticated non-browser WebSocket client that can reach a development server using interceptorPlugin can register a manual mock whose attacker-controlled url createManualModuleSource inserts unescaped into generated module source. When the developer browser loads the affected module, attacker-controlled JavaScript executes on the development-server origin. This issue is fixed in versions 4.1.12 and 5.0.3.","cvssScore":4.7,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","cwes":["CWE-94","CWE-116","CWE-306"],"vendors":[],"products":[],"references":[{"url":"https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35","tags":[]},{"url":"https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473","tags":[]},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v4.1.12","tags":[]},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v5.0.3","tags":[]},{"url":"https://github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8","tags":[]},{"url":"https://github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8","tags":[]}],"exploitRefs":[{"url":"https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35","tags":[]},{"url":"https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473","tags":[]},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v4.1.12","tags":[]},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v5.0.3","tags":[]},{"url":"https://github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8","tags":[]},{"url":"https://github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8","tags":[]}],"hasPoc":true,"ai":null}