CVE-2026-70607
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.
Does this matter?
Lower severity and a low EPSS score (0.44%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- EPSS
- 0.44% probability · 37th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-20
- Source
- security-advisories@github.com
References
- https://github.com/electron/electron/commit/30cf3882de75ee651bd4e5f27002f13fd3d3163a
- https://github.com/electron/electron/commit/4eff3dc09e4d1e62d649c5ce9902f532bb7469c7
- https://github.com/electron/electron/commit/615d62500fc7732d068274b796c49487e652e90b
- https://github.com/electron/electron/commit/fe2e7d0073949b4593b624b93abf1788f5377e55
- https://github.com/electron/electron/pull/50946
- https://github.com/electron/electron/pull/50947
- https://github.com/electron/electron/pull/50948
- https://github.com/electron/electron/pull/50949
- https://github.com/electron/electron/releases/tag/v39.8.8
- https://github.com/electron/electron/releases/tag/v40.9.0
- https://github.com/electron/electron/releases/tag/v41.2.1
- https://github.com/electron/electron/releases/tag/v42.0.0-beta.3
- https://github.com/electron/electron/security/advisories/GHSA-v93f-fgjr-hjrj
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.