Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS

Overview

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.

Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

Package advisory (CVE-2026-70606)

Affected packages:

• electron >= 43.0.0-alpha.1, < 43.0.0
• electron >= 42.0.0-alpha.1, < 42.5.1
• electron >= 41.0.0-alpha.1, < 41.9.1
• electron >= 40.0.0-alpha.1, < 40.10.6

Patched in:

• electron 43.0.0
• electron 42.5.1
• electron 41.9.1
• electron 40.10.6

Source: https://github.com/advisories/GHSA-r4w5-6pfg-jxp5