{"id":"CVE-2026-112949","sourceIdentifier":"security-advisories@github.com","published":"2026-10-20T16:17:05.660","lastModified":"2026-10-23T02:16:54.907","vulnStatus":"Awaiting Analysis","cveTags":[],"descriptions":[{"lang":"en","value":"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."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"vitest-dev","product":"vitest","versions":[{"version":">= 2.1.0-beta.7, < 4.1.12","status":"affected"},{"version":">= 5.0.0, < 5.0.3","status":"affected"}]},{"vendor":"@vitest","product":"mocker","versions":[{"version":">= 2.1.0-beta.7, < 4.1.12","status":"affected"},{"version":">= 5.0.0, < 5.0.3","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":4.7,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":1.6,"impactScore":2.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-10-23T01:42:18.590758Z","id":"CVE-2026-112949","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-94"},{"lang":"en","value":"CWE-116"},{"lang":"en","value":"CWE-306"}]}],"references":[{"url":"https://github.com/vitest-dev/vitest/commit/15cc006aa9f8683dc5f7e895d011fa7dc751ce35","source":"security-advisories@github.com"},{"url":"https://github.com/vitest-dev/vitest/commit/b825313243dc55757e8d7c0f9e7a792135e13473","source":"security-advisories@github.com"},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v4.1.12","source":"security-advisories@github.com"},{"url":"https://github.com/vitest-dev/vitest/releases/tag/v5.0.3","source":"security-advisories@github.com"},{"url":"https://github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8","source":"security-advisories@github.com"},{"url":"https://github.com/vitest-dev/vitest/security/advisories/GHSA-qxg6-89mg-rqv8","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}