---
id: CVE-2026-70612
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 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3,
  requests to open external protocol URLs from web content did not take iframe
  sand…
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-284
vendor: electron
product: electron
affected:
  - electron < 39.8.8
  - 'electron >= 40.0.0-alpha.1, < 40.9.0'
  - 'electron >= 41.0.0-alpha.1, < 41.2.1'
  - 'electron >= 42.0.0-alpha.1, < 42.0.0-beta.3'
patched:
  - electron 39.8.8
  - electron 40.9.0
  - electron 41.2.1
  - electron 42.0.0-beta.3
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-2026-70612'
references:
  - url: >-
      https://github.com/electron/electron/commit/08b9d0a220e267d1a2402a44bdd01a2e9aa320b5
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/commit/2764e4c35168855f614876051823db4f58a3714a
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/commit/477dcf7afc6550715f9ec5e6f39ee38e5dd7bf39
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/commit/c39e3d5687d57434c8d5fe814c5152efd2f631c3
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/50961'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/50962'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/50963'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/50964'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v39.8.8'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v40.9.0'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v41.2.1'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v42.0.0-beta.3'
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/security/advisories/GHSA-p2rr-rvmm-c5fp
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-p2rr-rvmm-c5fp'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00443
epssPercentile: 0.35835
aliases:
  - GHSA-p2rr-rvmm-c5fp
ecosystem: npm
ingestedAt: '2026-08-05T18:50:26.460Z'
---

## Overview

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame sandbox state was also not made available to the app permission handlers, affecting apps that render untrusted content in sandboxed iframes and grant the openExternal permission by default when no setPermissionRequestHandler is installed. This issue is fixed in 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

## Remediation

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

## Package advisory (CVE-2026-70612)

Affected packages:

- `electron < 39.8.8`
- `electron >= 40.0.0-alpha.1, < 40.9.0`
- `electron >= 41.0.0-alpha.1, < 41.2.1`
- `electron >= 42.0.0-alpha.1, < 42.0.0-beta.3`

Patched in:

- `electron 39.8.8`
- `electron 40.9.0`
- `electron 41.2.1`
- `electron 42.0.0-beta.3`

Source: https://github.com/advisories/GHSA-p2rr-rvmm-c5fp