CVE-2026-70602: Electronjs Electron

Medium severity, CVSS 6.6. 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 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, extension tab and scripting APIs were not scoped to the extension's own session. A malicious or compromised extension loaded into one session could navigate, script, and read from windows belonging to a different session. Apps are only affected if they load Chrome extensions via session.loadExtension and rely on separate sessions to isolate that extension from other content. This issue is fixed in versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

Affected products

• Electronjs Electron: before 39.8.8 (fixed in 39.8.8); from 40.0.0, before 40.9.0 (fixed in 40.9.0); from 41.0.0, before 41.2.1 (fixed in 41.2.1); version 42.0.0 only

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