Vulnerability · Published Aug 5, 2026 · Assigned by GitHub_M
CVE-2026-70599Electron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe Origin
Medium 5.9
In plain English
A medium-severity security flaw in electron from electron. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 9% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1, serial-port and media permission checks made from an iframe passed the top-level frame origin to session.setPermissionCheckHandler instead of the requesting iframe origin. Origin-based handler logic could grant a cross-origin iframe device access intended only for the top-level origin. This issue is fixed in 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | electron | 39.8.7 | GHSA-9pf5-hg6p-4pwp |
| npm | electron | 40.9.0 | GHSA-9pf5-hg6p-4pwp |
| npm | electron | 41.2.0 | GHSA-9pf5-hg6p-4pwp |
| npm | electron | 42.0.0-beta.1 | GHSA-9pf5-hg6p-4pwp |
Affected products (as reported)
Weakness: CWE-346 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N