Disclosure summary
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.
Source-reported weakness categories
CWE-346, CWE-693
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2026-102673
Open original source · Updated Sep 30, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
GitHub Reviewed Security Advisories · GHSA-hq2x-r82h-9wj4
Open original source · Updated Sep 29, 2026
Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab
Source severity: HIGH / 0
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| npm | electron | < 41.10.4 | 41.10.4 |
| npm | electron | >= 42.0.0-alpha.1, < 42.5.2 | 42.5.2 |
| npm | electron | >= 43.0.0-alpha.1, < 43.0.0 | 43.0.0 |
Original records & references
- NIST NVD record
- CVE Program record
- github.com
- github.com
- github.com
- github.com
- github.com
- github.com
- github.com
- github.com
PUBLISHED 2026-09-29T13:17:07-04:00
MODIFIED 2026-09-30T17:17:04-04:00
INGESTED 2026-10-06T11:43:05-04:00