Medium 5.9Published Aug 5, 2026

CVE-2026-70599Electron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe Origin

Updated under an hour ago (2026-10-19 09:30 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for electron

Exploited in the last 30 days

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.

CVSS: 5.9 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-346
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

electron electron electron:electron (from the name)	before 39.8.7; from 40.0.0-alpha.1, < 40.9.0; from 41.0.0-alpha.1, < 41.2.0; from 42.0.0-alpha.1, < 42.0.0-beta.1	CNA record
electronjs electron electronjs:electron	before 39.8.7; from 40.0.0 before 40.9.0; from 41.0.0 before 41.2.1; 42.0.0; 42.0.0; 42.0.0; 42.0.0; 42.0.0; and 3 more ranges	NVD

References

https://github.com/electron/electron/security/advisories/GHSA-9pf5-hg6p-4pwpx-refsource-confirm, vendor-advisory
https://github.com/electron/electron/commit/0cbdf2f0375466d701aa393c92e0ec29eb89ea6cx-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.