Use After Free Affecting electron package, versions <39.8.1>=40.0.0-alpha.2 <40.7.0>=41.0.0-alpha.1 <41.0.0
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- published3 Apr 2026
- disclosed3 Apr 2026
- creditUnknown
Introduced: 3 Apr 2026
NewCVE-2026-34774 (opens in a new tab)How to fix?
Upgrade electron to version 39.8.1, 40.7.0, 41.0.0 or higher.
Overview
electron is a framework which lets you write cross-platform desktop applications using JavaScript, HTML and CSS.
Affected versions of this package are vulnerable to Use After Free in the offscreen rendering process when a parent WebContents is destroyed while a child window remains open. An attacker can cause memory corruption or application crash by triggering paint frames on the child window that dereference freed memory.
Note:
This is only exploitable if offscreen rendering is enabled (webPreferences.offscreen: true) and the setWindowOpenHandler permits child windows.
Workaround
This vulnerability can be mitigated by denying child window creation from offscreen renderers in your setWindowOpenHandler, or ensuring child windows are closed before the parent is destroyed.