CVE-2026-34777
Published:April 03, 2026
Updated:April 20, 2026
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, when an iframe requests fullscreen, pointerLock, keyboardLock, openExternal, or media permissions, the origin passed to session.setPermissionRequestHandler() was the top-level page's origin rather than the requesting iframe's origin. Apps that grant permissions based on the origin parameter or webContents.getURL() may inadvertently grant permissions to embedded third-party content. The correct requesting URL remains available via details.requestingUrl. Apps that already check details.requestingUrl are not affected. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.
Affected Packages
electron (NPM):
Affected version(s) >=40.0.0-alpha.2 <40.8.1Fix Suggestion:
Update to version 40.8.1electron (NPM):
Affected version(s) >=41.0.0-alpha.1 <41.0.0Fix Suggestion:
Update to version 41.0.0electron (NPM):
Affected version(s) >=0.1.0 <38.8.6Fix Suggestion:
Update to version 38.8.6electron (NPM):
Affected version(s) >=39.0.0-alpha.1 <39.8.1Fix Suggestion:
Update to version 39.8.1Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
5.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Origin Validation Error
EPSS
Base Score:
0.01
