CVE-2026-6402: Exposed Dangerous Method or Function

webpack-dev-server versions up to and including 5.2.3 are vulnerable to cross-origin source code exposure when serving over a non-potentially trustworthy origin such as plain HTTP. The previous fix relied on the Sec-Fetch-Mode and Sec-Fetch-Site request headers, which browsers omit for...

webpack-dev-server 安全漏洞

webpack-dev-server is an open-source application developed by webpack. Versions of webpack-dev-server prior to version 5.2.3 contained security vulnerabilities. These vulnerabilities stemmed from exposure to cross-origin code. When it provided services through non-potentially trusted sources, suc...

Sensitive Information Disclosure

Vite is vulnerable to Sensitive Information Disclosure. The vulnerability is due to improper enforcement of file access restrictions in the dev server, which allows an attacker to bypass deny rules using crafted query parameters and access sensitive files...

Exploit for CVE-2026-39363

CVE-2026-39363 Vite Dev Server WebSocket Arbitrary File Read...

CVE-2026-39363

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 ?r...

CVE-2026-39364

Vite is a frontend tooling framework for JavaScript. From 7.1.0 to before 7.3.2 and 8.0.5, on the Vite dev server, files that should be blocked by server.fs.deny e.g., .env, .crt can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are...

CVE-2026-39365

Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, the dev server’s handling of .map requests for optimized dependencies resolves file paths and calls readFile without restricting ../ segments in the URL. As a result, it is possible to bypass the...

CVE-2026-39365

Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, the dev server’s handling of .map requests for optimized dependencies resolves file paths and calls readFile without restricting ../ segments in the URL. As a result, it is possible to bypass the...

CVE-2026-39365

Vite Dev Server path traversal in optimized dependencies .map handling affects versions prior to 6.4.2, 7.3.2, and 8.0.5. The server resolves file paths via normalizePath(path.resolve(root, url.slice(1))) and calls readFile without restricting ../ segments, allowing retrieval of .map files outsid...

CVE-2026-39364

The frontend tooling framework Vite is vulnerable to an access control bypass in the development server. Specifically, files intended to be blocked by the server.fs.deny configuration (such as .env or *.crt) can be retrieved with HTTP 200 responses. This occurs when an unauthenticated attacker ap...

CVE-2026-39364 Vite has a `server.fs.deny` bypass with queries

Vite is a frontend tooling framework for JavaScript. From 7.1.0 to before 7.3.2 and 8.0.5, on the Vite dev server, files that should be blocked by server.fs.deny e.g., .env, .crt can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are...

EUVD-2026-19873

Vite is a frontend tooling framework for JavaScript. From 7.1.0 to before 7.3.2 and 8.0.5, on the Vite dev server, files that should be blocked by server.fs.deny e.g., .env, .crt can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are...

CVE-2026-39364

Vite is a frontend tooling framework for JavaScript. From 7.1.0 to before 7.3.2 and 8.0.5, on the Vite dev server, files that should be blocked by server.fs.deny e.g., .env, .crt can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are...

CVE-2026-39364 Vite has a `server.fs.deny` bypass with queries

Vite is a frontend tooling framework for JavaScript. From 7.1.0 to before 7.3.2 and 8.0.5, on the Vite dev server, files that should be blocked by server.fs.deny e.g., .env, .crt can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are...

CVE-2026-39363 Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket

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 ?r...

CVE-2026-39363

CVE-2026-39363 affects Vite Dev Server. The WebSocket-based fetchModule RPC can be invoked without an Origin header, bypassing HTTP path access checks and enabling arbitrary file reads via file:// URLs combined with ?raw or ?inline. This occurs in Vite versions 6.0.0 up to before 6.4.2, 7.3.2, an...

CVE-2026-39363 Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket

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 ?r...

CVE-2026-39363 Vite Affected by Arbitrary File Read via Vite Dev Server WebSocket

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 ?r...

CVE-2026-39365: Improper Limitation of a Pathname to a Restricted Directory

Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, the dev server’s handling of .map requests for optimized dependencies resolves file paths and calls readFile without restricting ../ segments in the URL. As a result, it is possible to bypass the...

CVE-2026-39364: Incorrect Behavior Order: Validate Before Canonicalize

Vite is a frontend tooling framework for JavaScript. From 7.1.0 to before 7.3.2 and 8.0.5, on the Vite dev server, files that should be blocked by server.fs.deny e.g., .env, .crt can be retrieved with HTTP 200 responses when query parameters such as ?raw, ?import&raw, or ?import&url&inline are...