Origin Validation Error Affecting electron package, versions <38.8.6>=39.0.0-alpha.1 <39.8.1>=40.0.0-alpha.2 <40.8.1>=41.0.0-alpha.1 <41.0.0
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Test your applications- Snyk IDSNYK-JS-ELECTRON-15876718
- published3 Apr 2026
- disclosed3 Apr 2026
- creditUnknown
Introduced: 3 Apr 2026
NewCVE-2026-34777 (opens in a new tab)How to fix?
Upgrade electron to version 38.8.6, 39.8.1, 40.8.1, 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 Origin Validation Error in the session.setPermissionRequestHandler function. An attacker can gain unauthorized access to permissions such as fullscreen, pointerLock, keyboardLock, openExternal, or media by embedding malicious iframes that exploit the incorrect origin parameter passed to the handler. This may result in third-party content being granted permissions intended only for trusted origins.
Note:
This is only exploitable if the application grants permissions based on the origin parameter or webContents.getURL() rather than details.requestingUrl.
Workaround
This vulnerability can be mitigated by inspecting details.requestingUrl instead of the origin parameter or webContents.getURL() in the setPermissionRequestHandler when deciding whether to grant permissions.