CVE-2026-70599CWE-346

CVE-2026-70599

Medium · published August 5, 2026

CVSS v3.1
5.9
EPSS
0%
Percentile
8.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.9 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00193 · 8.5th percentile
Weakness
CWE-346 · Origin Validation Error
Published
2026-08-05T20:17Z
Affected products (11)
ProductVersionsFixed in
electronjs/electron< 39.8.739.8.7
electronjs/electron≥ 40.0.0, < 40.9.040.9.0
electronjs/electron≥ 41.0.0, < 41.2.141.2.1
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
electronjs/electronall versions—
References (2)
https://github.com/electron/electron/commit/0cbdf2f0375466d701aa393c92e0ec29eb89ea6c · [email protected]https://github.com/electron/electron/security/advisories/GHSA-9pf5-hg6p-4pwp · [email protected]
EPSS history
Timeline
  • 05 AUG 15:36Z
    Electron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe Origin
    cvelistv5