CVE-2026-70599
Medium
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.
SeverityMedium
CVSS5.9
Exploit probability—
ProductElectron
PublishedAug 5, 2026
First seenAug 5, 2026
Weakness typeCWE-346CWE-346
How to fix
Update
- electronjs electron39.8.7, 40.9.0, 41.2.1 or later
- electron39.8.7, 40.9.0, 41.2.0, 42.0.0-beta.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| electronjs electron | v < 39.8.7, 40.0.0 ≤ v < 40.9.0, 41.0.0 ≤ v < 41.2.1, 42.0.0 | 39.8.7, 40.9.0, 41.2.1 |
| electronnpm | v < 39.8.7, 40.0.0-alpha.1 ≤ v < 40.9.0, 41.0.0-alpha.1 ≤ v < 41.2.0, 42.0.0-alpha.1 ≤ v < 42.0.0-beta.1 | 39.8.7, 40.9.0, 41.2.0, 42.0.0-beta.1 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.