Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 41.10.3, and 42.0.1, a sandboxed iframe without the allow-popups keyword could still open a new window or trigger setWindowOpenHandler with no user interaction because new-window navigations taking the OpenURL path did not apply the iframe sandbox popup restriction. Apps that embed untrusted content in sandboxed iframes and rely on the absence of allow-popups to prevent window creation are affected, while apps that deny window creation in setWindowOpenHandler or do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in 39.8.10, 41.10.3, and 42.0.1.
Affected products
electronjs: electron
References10
- github.com/electron/electron/security/advisories/GHSA-9f4c-93c8… Vendor Advisory
- github.com/electron/electron/commit/3ff23c52ab364a0afc6ab5bd785… Patch
- github.com/electron/electron/commit/57cbe329c4ae8aab5ac5ebdcb58… Patch
- github.com/electron/electron/commit/68cf8b7d9122260f6b534a69a82… Patch
- github.com/electron/electron/pull/51437 Issue TrackingPatch
- github.com/electron/electron/pull/51438 Issue TrackingPatch
- github.com/electron/electron/pull/51439 Issue TrackingPatch
- github.com/electron/electron/releases/tag/v39.8.10 Release Notes
- github.com/electron/electron/releases/tag/v41.10.3 Release Notes
- github.com/electron/electron/releases/tag/v42.0.1 Release Notes
Metrics
- CVSS 3.1
-
7.2
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N - EPSS — exploit probability
- 0% percentile: 38 · as of 13 November 2026
- CWE
- CWE-693CWE-1021
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