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, some window options supplied by web content in the window.open() features string were applied to the new BrowserWindow without an allowlist. Untrusted content could set window options it should not control, including options that cause the main process to access attacker-chosen file or network paths, when untrusted content can call window.open() and the app does not override child window options via setWindowOpenHandler or overrideBrowserWindowOptions. This issue is fixed in 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.
Affected products
electronjs: electron
References10
- github.com/electron/electron/security/advisories/GHSA-v93f-fgjr… Vendor Advisory
- github.com/electron/electron/commit/30cf3882de75ee651bd4e5f2700… Patch
- github.com/electron/electron/commit/4eff3dc09e4d1e62d649c5ce990… Patch
- github.com/electron/electron/commit/615d62500fc7732d068274b796c… Patch
- github.com/electron/electron/commit/fe2e7d0073949b4593b624b93ab… Patch
- github.com/electron/electron/pull/50946 Issue TrackingPatch
- github.com/electron/electron/pull/50947 Issue TrackingPatch
- github.com/electron/electron/pull/50948 Issue TrackingPatch
- github.com/electron/electron/pull/50949 Issue TrackingPatch
- github.com/electron/electron/releases/tag/v39.8.8 Release Notes
Metrics
- CVSS 3.1
-
5.3
MEDIUM
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N - EPSS — exploit probability
- 1% percentile: 47 · as of 13 November 2026
- CWE
- CWE-20
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.