CVE-2026-70600: Electronjs Electron

Medium severity, CVSS 4.3. EPSS: 0.2% 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, the native autofill popup could be positioned by a cross-origin iframe outside that iframe's bounds, over the embedding page's UI, enabling clickjacking or spoofing of trusted UI. Apps are only affected if they embed untrusted content in iframes within windows that also display trusted UI. Apps that do not embed untrusted third-party content are not affected. 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, up to and including 41.2.1; version 42.0.0 only

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