CVE-2026-102673: Electron

High severity, CVSS 8.2. EPSS: 0.1% 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 41.10.4, 42.5.2, and 43.0.0, popups opened from a sandboxed iframe through Electron's OpenURLFromTab navigation path, including links using target="_blank" or a middle-click, did not receive the inherited HTML sandbox restrictions. An untrusted iframe using the allow-scripts allow-popups configuration could therefore open a popup with the embedding application's full origin, exposing that origin's cookies, storage, and same-origin scripting capabilities. Applications that do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in versions 41.10.4, 42.5.2, and 43.0.0.

Affected products

• Electron Electron: before 41.10.4 (fixed in 41.10.4); from 42.0.0-alpha.1, before 42.5.2 (fixed in 42.5.2); from 43.0.0-alpha.1, before 43.0.0 (fixed in 43.0.0)

Published 2026-09-29. Last modified 2026-09-30.