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Vulnerabilities CVE-2026-70606

CVE-2026-70606

Medium
Open
TLP:CLEAR

Electron: ProtocolResponse.url reuses the default session cache instead of the registering session

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Description

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.

Details

CVSS Score
5.9
EPSS Score
0.16%

5.4th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N
Confidence
90%
Published
Aug 5, 2026
Last Modified
Aug 5, 2026
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