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OpenAdvisories
Medium · 6.6 CVE-2026-70602 EUVD-2026-53435GHSA-m55f-7gqj-fr98

Electron: Extension tab APIs operate across session boundaries

Published Aug 5, 2026 · Updated Aug 5, 2026 · Assigned by GitHub_M

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, extension tab and scripting APIs were not scoped to the extension's own session. A malicious or compromised extension loaded into one session could navigate, script, and read from windows belonging to a different session. Apps are only affected if they load Chrome extensions via session.loadExtension and rely on separate sessions to isolate that extension from other content. This issue is fixed in versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

Affected products

VendorProductAffectedFixed
electron electron < 39.8.8, >= 40.0.0-alpha.1, < 40.9.0, >= 41.0.0-alpha.1, < 41.2.1, >= 42.0.0-alpha.1, < 42.0.0-beta.3 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm electron < 39.8.8 39.8.8 GHSA-m55f-7gqj-fr98
npm electron >= 40.0.0-alpha.1, < 40.9.0 40.9.0 GHSA-m55f-7gqj-fr98
npm electron >= 41.0.0-alpha.1, < 41.2.1 41.2.1 GHSA-m55f-7gqj-fr98
npm electron >= 42.0.0-alpha.1, < 42.0.0-beta.3 42.0.0-beta.3 GHSA-m55f-7gqj-fr98

References