{"id":"CVE-2026-112949","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-112949","generatedAt":"2026-10-28T02:59:14.141Z","title":"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…","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.","published":"2026-10-20T16:17:06.000Z","lastModified":"2026-10-23T02:16:55.000Z","status":"Awaiting Analysis","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"3.1","score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N"},"cwe":["CWE-94","CWE-116","CWE-306"],"affected":[],"epss":{"score":0.00336,"percentile":0.268,"date":"2026-10-26","history":[{"date":"2026-10-21","score":0.00242,"percentile":0.14441}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.34%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-20T16:17:06.000Z","detail":{"score":"4.7","severity":"MEDIUM","publishedAt":"2026-10-20T16:17:05.660Z"},"summary":"New CVE, medium severity (CVSS 4.7)."}],"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"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-112949","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}