Improper Restriction of Rendered UI Layers or Frames Affecting electron package, versions <39.8.10>=40.0.0-alpha.2 <41.10.3>=42.0.0-alpha.1 <42.0.1
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-18563343
- published6 Aug 2026
- disclosed5 Aug 2026
- creditCiarán
Introduced: 5 Aug 2026
NewCVE-2026-70608 (opens in a new tab)How to fix?
Upgrade electron to version 39.8.10, 41.10.3, 42.0.1 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 Improper Restriction of Rendered UI Layers or Frames in the OpenURL navigation path, which allows a sandboxed iframe without the allow-popups keyword to open a new window or trigger setWindowOpenHandler without user interaction. An attacker can circumvent intended popup restrictions by embedding untrusted content in a sandboxed iframe and leveraging this navigation path.
Note: This is only exploitable if applications rely solely on the absence of allow-popups in the iframe sandbox to prevent window creation.
Workaround
This vulnerability can be mitigated by returning { action: 'deny' } from setWindowOpenHandler for any content that is not trusted.