CVE-2026-70601: Electronjs Electron

High severity, CVSS 7.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.5, apps that expose Promise-returning functions to web content via contextBridge may be vulnerable to a context isolation bypass. Untrusted web content could obtain access to the isolated preload world and, through it, every capability the preload script has. In renderers without a sandbox, or with nodeIntegration enabled, this may escalate to Node.js access. Apps are affected if they expose Promise-returning functions via contextBridge, the standard pattern for wrapping ipcRenderer.invoke, in windows that load untrusted content. This issue is fixed in versions 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.5.

Affected products

• Electronjs Electron: before 39.8.9 (fixed in 39.8.9); from 40.0.0, before 40.9.2 (fixed in 40.9.2); from 41.0.0, before 41.2.2 (fixed in 41.2.2); version 42.0.0 only

Published 2026-08-05. Last modified 2026-10-08.