CVE-2026-70609: Electronjs Electron

Medium severity, CVSS 5.7. EPSS: 0.5% 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 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1, the mode option of webContents.openDevTools() was not sanitized before use by the DevTools frontend. If an attacker can influence this value, script under their control may run in the DevTools context, which in unsandboxed configurations has access to Node.js, including when untrusted input reaches the mode argument of openDevTools() or untrusted content calls openDevTools() on a webview it embeds. This issue is fixed in 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1.

Affected products

• Electronjs Electron: before 39.8.7 (fixed in 39.8.7); from 40.0.0, before 40.9.0 (fixed in 40.9.0); from 41.0.0, before 41.2.0 (fixed in 41.2.0); version 42.0.0 only

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