CVE-2026-34778: Electronjs Electron

Medium severity, CVSS 6.5. 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 versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, a service worker running in a session could spoof reply messages on the internal IPC channel used by webContents.executeJavaScript() and related methods, causing the main-process promise to resolve with attacker-controlled data. Apps are only affected if they have service workers registered and use the result of webContents.executeJavaScript() (or webFrameMain.executeJavaScript()) in security-sensitive decisions. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.

Affected products

• Electronjs Electron: before 38.8.6 (fixed in 38.8.6); from 39.0.0, before 39.8.1 (fixed in 39.8.1); from 40.0.0, before 40.8.1 (fixed in 40.8.1); version 41.0.0 only

Published 2026-04-04. Last modified 2026-07-24.