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-2026-39363

CVE-2026-39363 — Vite Dev Server WebSocket 임의 파일 읽기 대량 탐지 면책 조항: 이 도구는 승인된 보안 테스트 및 교육 연구 목적으로만 사용됩니다. 사용자는 현지 법률 및 규정을 준수해야 하며, 승인 없이 타인 시스템을 스캔하거나 공격하는 것은 불법 행위입니다. 저자는 어떠한 오용 행위에 대해서도 책임을 지지 않습니다. 취약점 설명 Vite 개발 서버6.0.0 6.4.1, 7.0.0 7.3.1, 8.0.0 8.0.4의 HMR WebSocket이 Origin 헤더를 검증하지 않아, 공격자는...

CVE-2026-39363

CVE-2026-39363 — Vite Dev Server 임의 파일 읽기 PoC GHSA-p9ff-h696-f583 대상 즉시 실행 가능한 PoC입니다. 인증되지 않은 HMR WebSocket을 통해 fetchModule을 호출하여 HTTP 레이어의 server.fs.allow 제한을 우회하고, dev server가 실행 중인 머신의 임의 파일을 읽습니다. 영향 범위...

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

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 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...

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...

SUSE CVE-2026-9595

Impact: When a user-configured proxy on webpack-dev-server has a broad context e.g. / and ws: true, it also intercepts the dev server's own HMR WebSocket and forwards it to the proxy target. This leaks the browser's cookies and Origin header to the backend, bypasses the dev server's Host/Origin...

Linux Distros Unpatched Vulnerability : CVE-2026-9595

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Impact: When a user-configured proxy on webpack-dev-server has a broad context e.g. / and ws: true, it also intercepts the dev server's own HMR WebSocket and...