CVE-2026-102673
Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab
- State
- Published
- Severity
- 8.2 High
- Published
- Sep 29, 2026
- Updated
- Sep 30, 2026
- Reserved
- Sep 29, 2026
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 41.10.4, 42.5.2, and 43.0.0, popups opened from a sandboxed iframe through Electron's OpenURLFromTab navigation path, including links using target="_blank" or a middle-click, did not receive the inherited HTML sandbox restrictions. An untrusted iframe using the allow-scripts allow-popups configuration could therefore open a popup with the embedding application's full origin, exposing that origin's cookies, storage, and same-origin scripting capabilities. Applications that do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in versions 41.10.4, 42.5.2, and 43.0.0.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.2 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N | GitHub_M |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
electronelectron |
|
References
- https://github.com/electron/electron/security/advisories/GHSA-hq2x-r82h-9wj4
- https://github.com/electron/electron/pull/52133
- https://github.com/electron/electron/commit/7ea14d5f55ecb11a30447701ddca16b3feee0bba
- https://github.com/electron/electron/commit/e26b2640e7795c42bfb111b76009cbb4327c9a69
- https://github.com/electron/electron/commit/ebe1165ee2b05c203c26dd2244ef1c5b9b1c04da
- https://github.com/electron/electron/releases/tag/v41.10.4
- https://github.com/electron/electron/releases/tag/v42.5.2
- https://github.com/electron/electron/releases/tag/v43.0.0
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