---
id: CVE-2026-70599
title: >-
  Electron is a framework for writing cross-platform desktop applications using
  JavaScript, HTML and CSS
summary: >-
  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 …
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-346
vendor: electron
product: electron
affected:
  - electron < 39.8.7
  - 'electron >= 40.0.0-alpha.1, < 40.9.0'
  - 'electron >= 41.0.0-alpha.1, < 41.2.0'
  - 'electron >= 42.0.0-alpha.1, < 42.0.0-beta.1'
patched:
  - electron 39.8.7
  - electron 40.9.0
  - electron 41.2.0
  - electron 42.0.0-beta.1
published: '2026-08-05'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:44:08.253'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70599'
references:
  - url: >-
      https://github.com/electron/electron/commit/0cbdf2f0375466d701aa393c92e0ec29eb89ea6c
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/security/advisories/GHSA-9pf5-hg6p-4pwp
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-9pf5-hg6p-4pwp'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00182
epssPercentile: 0.08017
aliases:
  - GHSA-9pf5-hg6p-4pwp
ecosystem: npm
ingestedAt: '2026-08-05T15:49:00.624Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-70599)

Affected packages:

- `electron < 39.8.7`
- `electron >= 40.0.0-alpha.1, < 40.9.0`
- `electron >= 41.0.0-alpha.1, < 41.2.0`
- `electron >= 42.0.0-alpha.1, < 42.0.0-beta.1`

Patched in:

- `electron 39.8.7`
- `electron 40.9.0`
- `electron 41.2.0`
- `electron 42.0.0-beta.1`

Source: https://github.com/advisories/GHSA-9pf5-hg6p-4pwp