CVE-2026-70604
Published:August 05, 2026
Updated:August 06, 2026
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 40.9.3, 41.4.0, and 42.0.0, a custom scheme registered with supportFetchAPI: true but without corsEnabled: true was not subject to CORS enforcement. A page loaded from a remote origin could therefore fetch() or XMLHttpRequest that scheme cross-origin and read the full response body, rather than the read being blocked. Apps that serve sensitive data from such a scheme and load remote or untrusted content in a renderer are affected. This issue is fixed in versions 39.8.10, 40.9.3, 41.4.0, and 42.0.0.
Affected Packages
electron (NPM):
Affected version(s) >=41.0.0-alpha.1 <41.4.0Fix Suggestion:
Update to version 41.4.0electron (NPM):
Affected version(s) >=0.1.0 <39.8.10Fix Suggestion:
Update to version 39.8.10electron (NPM):
Affected version(s) >=40.0.0-alpha.2 <40.9.3Fix Suggestion:
Update to version 40.9.3electron (NPM):
Affected version(s) >=42.0.0-alpha.1 <42.0.0Fix Suggestion:
Update to version 42.0.0Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
8.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.4
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Weakness Type (CWE)
Permissive Cross-domain Security Policy with Untrusted Domains