Use After Free Affecting electron package, versions <38.8.6>=39.0.0-alpha.1 <39.8.0>=40.0.0-alpha.2 <40.7.0>=41.0.0-alpha.1 <41.0.0-beta.8
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Test your applications- Snyk IDSNYK-JS-ELECTRON-15876398
- published3 Apr 2026
- disclosed3 Apr 2026
- creditUnknown
Introduced: 3 Apr 2026
NewCVE-2026-34771 (opens in a new tab)How to fix?
Upgrade electron to version 38.8.6, 39.8.0, 40.7.0, 41.0.0-beta.8 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 via the session.setPermissionRequestHandler process. An attacker can cause a crash or memory corruption by triggering a permission request for fullscreen, pointer-lock, or keyboard-lock, and then navigating the requesting frame or closing the window while the permission handler is pending.
Note:
This is only exploitable if an asynchronous permission request handler is registered and invoked while the request is pending.
Workaround
This vulnerability can be mitigated by responding to permission requests synchronously, or by denying fullscreen, pointer-lock, and keyboard-lock requests if an asynchronous flow is required.