CVE-2026-70606
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 40.10.6, 41.9.1, 42.5.1, and 43.0.0, when a custom protocol handler returned a ProtocolResponse with a url and no session, Electron made the upstream request through defaultSession instead of the session that handled the protocol. A cached response could then be reused across otherwise isolated session partitions. Apps that use ProtocolResponse.url, omit ProtocolResponse.session, and rely on separate sessions to isolate content are affected. This issue is fixed in versions 40.10.6, 41.9.1, 42.5.1, and 43.0.0.
Affected Packages
electron (NPM):
Affected version(s) >=43.0.0-alpha.1 <43.0.0Fix Suggestion:
Update to version 43.0.0electron (NPM):
Affected version(s) >=42.0.0-alpha.1 <42.5.1Fix Suggestion:
Update to version 42.5.1electron (NPM):
Affected version(s) >=41.0.0-alpha.1 <41.9.1Fix Suggestion:
Update to version 41.9.1electron (NPM):
Affected version(s) >=40.0.0-alpha.2 <40.10.6Fix Suggestion:
Update to version 40.10.6Related Resources (2)
Do you need more information?
Contact UsCVSS v4
Base Score:
6
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.9
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Exposure of Resource to Wrong Sphere