---
id: CVE-2026-70610
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 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4,
  objects copied across the contextBridge boundary from untrusted content could
  car…
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-1321
vendor: electron
product: electron
affected:
  - electron < 39.8.9
  - 'electron >= 40.0.0-alpha.1, < 40.9.2'
  - 'electron >= 41.0.0-alpha.1, < 41.2.2'
  - 'electron >= 42.0.0-alpha.1, < 42.0.0-beta.4'
patched:
  - electron 39.8.9
  - electron 40.9.2
  - electron 41.2.2
  - electron 42.0.0-beta.4
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-2026-70610'
references:
  - url: >-
      https://github.com/electron/electron/commit/17d5d26499cd279fab48f5f26527f8edc02a7713
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/commit/23a6efb714dec80e2cf45d3054d18d701162e4dd
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/commit/4ac50292d552fb510eb778392620c85308770a55
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/commit/5b699544cbbed51bedb7c60d75c8c42be5825737
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/51083'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/51084'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/51085'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/pull/51086'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v39.8.9'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v40.9.2'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v41.2.2'
    label: security-advisories@github.com
  - url: 'https://github.com/electron/electron/releases/tag/v42.0.0-beta.4'
    label: security-advisories@github.com
  - url: >-
      https://github.com/electron/electron/security/advisories/GHSA-ff2p-hmqr-hxm4
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-ff2p-hmqr-hxm4'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00582
epssPercentile: 0.4543
aliases:
  - GHSA-ff2p-hmqr-hxm4
ecosystem: npm
ingestedAt: '2026-08-05T17:49:58.124Z'
---

## Overview

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4, objects copied across the contextBridge boundary from untrusted content could carry an attacker-influenced prototype, enabling prototype-pollution-style attacks against preload code despite context isolation being enabled. Apps are only affected if their preload code accepts object arguments from untrusted content and reads properties from them without own-property checks, while apps that only accept primitive arguments or validate object arguments are not affected. This issue is fixed in 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4.

## Remediation

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

## Package advisory (CVE-2026-70610)

Affected packages:

- `electron < 39.8.9`
- `electron >= 40.0.0-alpha.1, < 40.9.2`
- `electron >= 41.0.0-alpha.1, < 41.2.2`
- `electron >= 42.0.0-alpha.1, < 42.0.0-beta.4`

Patched in:

- `electron 39.8.9`
- `electron 40.9.2`
- `electron 41.2.2`
- `electron 42.0.0-beta.4`

Source: https://github.com/advisories/GHSA-ff2p-hmqr-hxm4