Use After Free Affecting org.webjars.npm:electron package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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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?
A fix was pushed into the master branch but not yet published.
Overview
org.webjars.npm: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.