---
id: CVE-2026-70608
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, 41.10.3, and 42.0.1, a sandboxed
  iframe without the allow-popups keyword could still open a new window or
  trigger s…
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-693
  - CWE-1021
vendor: electron
product: electron
affected:
  - 'electron >= 42.0.0-alpha.1, < 42.0.1'
  - 'electron >= 40.0.0-alpha.1, < 41.10.3'
  - electron < 39.8.10
patched:
  - electron 42.0.1
  - electron 41.10.3
  - 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-2026-70608'
references:
  - url: >-
      https://github.com/electron/electron/commit/3ff23c52ab364a0afc6ab5bd7851291d3159de57
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/commit/57cbe329c4ae8aab5ac5ebdcb588adc9a11de0d3
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/commit/68cf8b7d9122260f6b534a69a82c701a56cf159f
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/51437'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/51438'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/51439'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v39.8.10'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v41.10.3'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v42.0.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/security/advisories/GHSA-9f4c-93c8-jc8g
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-9f4c-93c8-jc8g'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00324
epssPercentile: 0.25624
aliases:
  - GHSA-9f4c-93c8-jc8g
ecosystem: npm
ingestedAt: '2026-08-05T17:49:58.187Z'
---

## Overview

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 41.10.3, and 42.0.1, a sandboxed iframe without the allow-popups keyword could still open a new window or trigger setWindowOpenHandler with no user interaction because new-window navigations taking the OpenURL path did not apply the iframe sandbox popup restriction. Apps that embed untrusted content in sandboxed iframes and rely on the absence of allow-popups to prevent window creation are affected, while apps that deny window creation in setWindowOpenHandler or do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in 39.8.10, 41.10.3, and 42.0.1.

## Remediation

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

## Package advisory (CVE-2026-70608)

Affected packages:

- `electron >= 42.0.0-alpha.1, < 42.0.1`
- `electron >= 40.0.0-alpha.1, < 41.10.3`
- `electron < 39.8.10`

Patched in:

- `electron 42.0.1`
- `electron 41.10.3`
- `electron 39.8.10`

Source: https://github.com/advisories/GHSA-9f4c-93c8-jc8g