Exposure of Data Element to Wrong Session Affecting electron package, versions <39.8.8>=40.0.0-alpha.2 <40.9.1>=41.0.0-alpha.1 <41.2.1>=42.0.0-alpha.1 <42.0.0-beta.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-ELECTRON-18563356
- published6 Aug 2026
- disclosed5 Aug 2026
- creditUnknown
Introduced: 5 Aug 2026
NewCVE-2026-70602 (opens in a new tab)How to fix?
Upgrade electron to version 39.8.8, 40.9.1, 41.2.1, 42.0.0-beta.3 or higher.
Overview
electron is a framework which lets you write cross-platform desktop applications using JavaScript, HTML and CSS.
Affected versions of this package are vulnerable to Exposure of Data Element to Wrong Session via the extension tab and scripting APIs not being properly scoped to the extension's own session. An attacker can access, navigate, and read data from windows belonging to a different session by loading a malicious or compromised extension.
Note: This is only exploitable if Chrome extensions are loaded via session.loadExtension and the application relies on separate sessions to isolate extensions from other content.
Workaround
This vulnerability can be mitigated by only loading extensions from trusted sources and not relying solely on session separation for isolation.