---
id: CVE-2026-70604
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 39.8.10, 40.9.3, 41.4.0, and 42.0.0, a
  custom scheme registered with supportFetchAPI: true but without corsEnabled:
  true was…
severity: high
cvss: 7.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N'
cwe:
  - CWE-942
vendor: electron
product: electron
affected:
  - 'electron >= 42.0.0-alpha.1, < 42.0.0'
  - 'electron >= 41.0.0-alpha.1, < 41.4.0'
  - 'electron >= 40.0.0-alpha.1, < 40.9.3'
  - electron < 39.8.10
patched:
  - electron 42.0.0
  - electron 41.4.0
  - electron 40.9.3
  - electron 39.8.10
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-2026-70604'
references:
  - url: >-
      https://github.com/electron/electron/security/advisories/GHSA-v3j7-r9gq-3gjw
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-v3j7-r9gq-3gjw'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00281
epssPercentile: 0.20883
aliases:
  - GHSA-v3j7-r9gq-3gjw
ecosystem: npm
ingestedAt: '2026-08-05T16:49:29.284Z'
---

## Overview

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 40.9.3, 41.4.0, and 42.0.0, a custom scheme registered with supportFetchAPI: true but without corsEnabled: true was not subject to CORS enforcement. A page loaded from a remote origin could therefore fetch() or XMLHttpRequest that scheme cross-origin and read the full response body, rather than the read being blocked. Apps that serve sensitive data from such a scheme and load remote or untrusted content in a renderer are affected. This issue is fixed in versions 39.8.10, 40.9.3, 41.4.0, and 42.0.0.

## Remediation

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

## Package advisory (CVE-2026-70604)

Affected packages:

- `electron >= 42.0.0-alpha.1, < 42.0.0`
- `electron >= 41.0.0-alpha.1, < 41.4.0`
- `electron >= 40.0.0-alpha.1, < 40.9.3`
- `electron < 39.8.10`

Patched in:

- `electron 42.0.0`
- `electron 41.4.0`
- `electron 40.9.3`
- `electron 39.8.10`

Source: https://github.com/advisories/GHSA-v3j7-r9gq-3gjw