CVE-2026-34778
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, a service worker running in a session could spoof reply messages on the internal IPC channel used by webContents.executeJavaScript() and related methods, causing the main-process promise to resolve with attacker-controlled data. Apps are only affected if they have service workers registered and use the result of webContents.executeJavaScript() (or webFrameMain.executeJavaScript()) in security-sensitive decisions. 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) >=41.0.0-alpha.1 <41.0.0Fix Suggestion:
Update to version 41.0.0electron (NPM):
Affected version(s) >=39.0.0-alpha.1 <39.8.1Fix Suggestion:
Update to version 39.8.1electron (NPM):
Affected version(s) >=0.1.0 <38.8.6Fix Suggestion:
Update to version 38.8.6electron (NPM):
Affected version(s) >=40.0.0-alpha.2 <40.8.1Fix Suggestion:
Update to version 40.8.1Related Resources (3)
Do you need more information?
Contact UsCVSS v4
Base Score:
6
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
EPSS
Base Score:
0.01
