Answer in brief
CVE-2026-39363 records a High severity (CVSS 7.5) vulnerability in Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket. The current sources do not mark it as known exploited. The current feed maps vitejs/vite (generic), vitejs/vite-plus (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 7.5. 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 vitejs/vite (generic), vitejs/vite-plus (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:vitejs:vite:*:*:*:*:*:node.js:*:* | Not reported | Not reported |
| cpe:2.3:a:voidzero:vite\+:*:*:*:*:*:node.js:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| vitejs/vitegeneric | >= 8.0.0, < 8.0.5 || >= 7.0.0, < 7.3.2 || >= 6.0.0, < 6.4.2 | Not reported |
| vitejs/vite-plusgeneric | < 0.1.16 | Not reported |
Published upstream
Apr 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 15, 2026
Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, if it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite:invoke and combine file://... with ?raw (or ?inline) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., export default "..."). The access control enforced in the HTTP request path (such as server.fs.allow) is not applied to this WebSocket-based execution path. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-39363 records a High severity (CVSS 7.5) vulnerability in Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket. The current sources do not mark it as known exploited. The current feed maps vitejs/vite (generic), vitejs/vite-plus (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 7.5. 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 vitejs/vite (generic), vitejs/vite-plus (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:a:vitejs:vite:*:*:*:*:*:node.js:*:* | Not reported | Not reported |
| cpe:2.3:a:voidzero:vite\+:*:*:*:*:*:node.js:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| vitejs/vitegeneric | >= 8.0.0, < 8.0.5 || >= 7.0.0, < 7.3.2 || >= 6.0.0, < 6.4.2 | Not reported |
| vitejs/vite-plusgeneric | < 0.1.16 | Not reported |
Published upstream
Apr 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 4, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jul 15, 2026
Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, if it is possible to connect to the Vite dev server’s WebSocket without an Origin header, an attacker can invoke fetchModule via the custom WebSocket event vite:invoke and combine file://... with ?raw (or ?inline) to retrieve the contents of arbitrary files on the server as a JavaScript string (e.g., export default "..."). The access control enforced in the HTTP request path (such as server.fs.allow) is not applied to this WebSocket-based execution path. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.
Quoted source text, attributed separately from HOL analysis.