CVE-2026-39363

CVE-2026-39363 — Vite Dev Server Arbitrary File Read PoC A drop-in PoC for GHSA-p9ff-h696-f583. It reads arbitrary files from the machine running the dev server by calling fetchModule over an unauthenticated HMR WebSocket, bypassing the HTTP-layer server.fs.allow restriction. Affected Versions...

CVE-2026-39363

CVE-2026-39363 — Vite Dev Server WebSocket Arbitrary File Read Batch Detection Disclaimer: This tool is intended for authorized security testing and educational research only. Users must comply with local laws and regulations; unauthorized scanning or attacking others' systems is illegal. The...

webpack-dev-server: webpack-dev-server: Information disclosure and denial of service via improper proxy configuration

A flaw was found in webpack-dev-server. When a user configures a proxy with a broad context, such as '/', and enables WebSocket ws: true forwarding, the development server's own Hot Module Replacement HMR WebSocket can be intercepted. This interception leads to the leakage of the browser's cookie...

EUVD-2026-69705

Vitest: Path Traversal / Arbitrary File Read via @vitest/mocker Redirect Mock...

GHSA-82FW-GWWQ-J7X9 Vitest: Path Traversal / Arbitrary File Read via @vitest/mocker Redirect Mock

Summary @vitest/mocker registers a redirect mock's target path without validating it against the dev server's file-serving allowlist. An attacker who can reach the dev server's WebSocket can register a redirect mock pointing outside the project root; when the mocked module is requested, the...

SUSE CVE-2026-84373

Vitest is a testing framework powered by Vite. From 2.1.0 until 4.1.11 and 5.0.0-rc.2, the public mockerPlugin and standalone interceptorPlugin exports in packages/mocker/src/node/interceptorPlugin.ts register the vitest:interceptor:register handler on Vite's unauthenticated HMR WebSocket without...

Linux Distros Unpatched Vulnerability : CVE-2026-84373

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Vitest is a testing framework powered by Vite. From 2.1.0 until 4.1.11 and 5.0.0-rc.2, the public mockerPlugin and standalone interceptorPlugin exports in...

CVE-2026-84373

Vitest is a testing framework powered by Vite. From 2.1.0 until 4.1.11 and 5.0.0-rc.2, the public mockerPlugin and standalone interceptorPlugin exports in packages/mocker/src/node/interceptorPlugin.ts register the vitest:interceptor:register handler on Vite's unauthenticated HMR WebSocket without...

CVE-2026-84373

A flaw was found in Vitest, a testing framework. A remote attacker, able to reach an exposed development server, could exploit an issue in the mockerPlugin and interceptorPlugin exports. These plugins register a handler on Vite's unauthenticated HMR WebSocket without properly validating redirect...

CVE-2026-84373 Vitest: Path Traversal / Arbitrary File Read via @vitest/mocker Redirect Mock

Vitest is a testing framework powered by Vite. From 2.1.0 until 4.1.11 and 5.0.0-rc.2, the public mockerPlugin and standalone interceptorPlugin exports in packages/mocker/src/node/interceptorPlugin.ts register the vitest:interceptor:register handler on Vite's unauthenticated HMR WebSocket without...

CVE-2026-84373

Vitest is a testing framework powered by Vite. From 2.1.0 until 4.1.11 and 5.0.0-rc.2, the public mockerPlugin and standalone interceptorPlugin exports in packages/mocker/src/node/interceptorPlugin.ts register the vitest:interceptor:register handler on Vite's unauthenticated HMR WebSocket without...

CVE-2026-84373 Vitest: Path Traversal / Arbitrary File Read via @vitest/mocker Redirect Mock

Vitest is a testing framework powered by Vite. From 2.1.0 until 4.1.11 and 5.0.0-rc.2, the public mockerPlugin and standalone interceptorPlugin exports in packages/mocker/src/node/interceptorPlugin.ts register the vitest:interceptor:register handler on Vite's unauthenticated HMR WebSocket without...

CVE-2026-84373 Vitest: Path Traversal / Arbitrary File Read via @vitest/mocker Redirect Mock

Vitest is a testing framework powered by Vite. From 2.1.0 until 4.1.11 and 5.0.0-rc.2, the public mockerPlugin and standalone interceptorPlugin exports in packages/mocker/src/node/interceptorPlugin.ts register the vitest:interceptor:register handler on Vite's unauthenticated HMR WebSocket without...

CVE-2026-84373

CVE-2026-84373 affects Vitest (a Vite-powered testing framework) versions 2.1.0 through 4.1.10 and 5.0.0-rc.1 . The vulnerability exists in the mockerPlugin and interceptorPlugin exports within packages/mocker/src/node/interceptorPlugin.ts, which register a vitest:interceptor:register handler on ...

CVE-2026-84373: Improper Limitation of a Pathname to a Restricted Directory

Vitest is a testing framework powered by Vite. From 2.1.0 until 4.1.11 and 5.0.0-rc.2, the public mockerPlugin and standalone interceptorPlugin exports in packages/mocker/src/node/interceptorPlugin.ts register the vitest:interceptor:register handler on Vite's unauthenticated HMR WebSocket without...

PT-2026-84521

Name of the Vulnerable Software and Affected Versions Vitest versions 2.1.0 through 4.1.10 Vitest versions 5.0.0-rc.0 through 5.0.0-rc.1 Description The mockerPlugin and interceptorPlugin exports in packages/mocker/src/node/interceptorPlugin.ts register the vitest:interceptor:register handler on...

webpack-dev-server: webpack-dev-server: Information disclosure and denial of service via improper proxy configuration

A flaw was found in webpack-dev-server. When a user configures a proxy with a broad context, such as '/', and enables WebSocket ws: true forwarding, the development server's own Hot Module Replacement HMR WebSocket can be intercepted. This interception leads to the leakage of the browser's cookie...

CVE-2026-71319

Nuxt is an open-source web development framework for Vue.js. Prior to 3.3.1, Nuxt DevTools development mode only exposes a bidirectional RPC channel over the Vite HMR WebSocket via the nuxt:devtools:rpc plugin. On affected versions the channel has no authentication: any client that can reach the...

GHSA-279X-MWFV-VCQV Unauthenticated Nuxt DevTools RPC allows arbitrary command execution on the developer's host

Impact Nuxt DevTools development mode only exposes a bidirectional RPC channel over the Vite HMR WebSocket via the nuxt:devtools:rpc plugin. On affected versions the channel has no authentication: any client that can reach the Vite HMR endpoint ws://:/, subprotocol vite-hmr can call RPC methods,...

CVE-2026-71319 Nuxt.js Unauthenticated WebSocket RPC Call Leading to Remote Code Execution

Nuxt is an open-source web development framework for Vue.js. Prior to 3.3.1, Nuxt DevTools development mode only exposes a bidirectional RPC channel over the Vite HMR WebSocket via the nuxt:devtools:rpc plugin. On affected versions the channel has no authentication: any client that can reach the...