Answer in brief
CVE-2026-112949 records a Medium severity (CVSS 4.7) vulnerability in Vitest: Code injection via unauthenticated manual mock registration. The current sources do not mark it as known exploited. The current feed maps @vitest/mocker (generic), vitest-dev/vitest (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 4.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps @vitest/mocker (generic), vitest-dev/vitest (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| @vitest/mockergeneric | >=2.1.0-beta.7 <4.1.12 || >=5.0.0 <5.0.3 | 4.1.12, 5.0.3 |
| vitest-dev/vitestgeneric | >=2.1.0-beta.7 <4.1.12 || >=5.0.0 <5.0.3 | 4.1.12, 5.0.3 |
Published upstream
Oct 20, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 20, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 20, 2026
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.
Quoted source text, attributed separately from HOL analysis.