Cline Kanban Server has a Cross-Origin WebSocket Hijacking Vulnerability

Summary The kanban npm package used by the cline CLI starts a WebSocket server on 127.0.0.1:3484 with no Origin header validation. Any website a developer visits can silently connect to the kanban server via WebSocket and: 1. Leak sensitive data in real-time: workspace filesystem paths, task...

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-2026-39363

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...

GHSA-XP2M-98X8-RPJ6 SiYuan Vulnerable to Cross-Origin WebSocket Hijacking via Authentication Bypass — Unauthenticated Information Disclosure

Cross-Origin WebSocket Hijacking via Authentication Bypass — Unauthenticated Information Disclosure Summary SiYuan's WebSocket endpoint /ws allows unauthenticated connections when specific URL parameters are provided ?app=siyuan&id=auth&type=auth. This bypass, intended for the login page to keep...

PT-2026-26170

Name of the Vulnerable Software and Affected Versions SiYuan versions 3.6.0 and earlier SiYuan versions 3.5.9 and earlier Description SiYuan, a personal knowledge management system, has a flaw in its WebSocket endpoint '/ws' that permits unauthenticated connections when specific URL parameters ar...

CVE-2025-68930

Traccar open-source GPS tracking system versions up to 6.11.1 are affected by a Cross-Site WebSocket Hijacking (CSWSH) in the /api/socket endpoint. The vulnerability arises from the application not validating the Origin header during the WebSocket handshake, allowing an attacker to bypass Same-Or...

CVE-2026-22689 Mailpit is vulnerable to Cross-Site WebSocket Hijacking (CSWSH) allowing unauthenticated access to emails

Mailpit is an email testing tool and API for developers. Prior to version 1.28.2, the Mailpit WebSocket server is configured to accept connections from any origin. This lack of Origin header validation introduces a Cross-Site WebSocket Hijacking CSWSH vulnerability. An attacker can host a malicio...

CVE-2025-24964 Remote Code Execution when accessing a malicious website while Vitest API server is listening

Vitest is a testing framework powered by Vite. Affected versions are subject to arbitrary remote Code Execution when accessing a malicious website while Vitest API server is listening by Cross-site WebSocket hijacking CSWSH attacks. When api option is enabled Vitest UI enables it, Vitest starts a...

SUSE CVE-2014-8638

The navigator.sendBeacon implementation in Mozilla Firefox before 35.0, Firefox ESR 31.x before 31.4, Thunderbird before 31.4, and SeaMonkey before 2.32 omits the CORS Origin header, which allows remote attackers to bypass intended CORS access-control checks and conduct cross-site request forgery...

Mozilla: sendBeacon requests lack an Origin header (MFSA 2015-03)

The navigator.sendBeacon implementation in Mozilla Firefox before 35.0, Firefox ESR 31.x before 31.4, Thunderbird before 31.4, and SeaMonkey before 2.32 omits the CORS Origin header, which allows remote attackers to bypass intended CORS access-control checks and conduct cross-site request forgery...