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CVE-2026-34765— Electron named window.open targets not scoped to the opener's browsing context

Quick assessment

Affected
electron electron
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Electron是Electron开源的一个用户编写跨平台桌面应用的 JavaScript 框架。该框架基于 nodejs 和 Chromium 可以使用HTML，CSS实现跨平台桌面应用的编写。 Electron 39.8.5之前版本、40.8.5之前版本、41.1.0之前版本和42.0.0-alpha.5之前版本存在安全漏洞，该漏洞源于命名窗口查找未正确限定范围，可能导致权限提升或任意代码执行。

CVSS 6.0 · Medium EPSS 0.38% · P29

Possible ATT&CK Techniques 1 AI

T1136.001 · Local Account
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I. Basic Information for CVE-2026-34765

Vulnerability Information
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Vulnerability Title
Electron named window.open targets not scoped to the opener's browsing context
Source: CVE Program / CVE List V5
Vulnerability Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5, when a renderer calls window.open() with a target name, Electron did not correctly scope the named-window lookup to the opener's browsing context group. A renderer could navigate an existing child window that was opened by a different, unrelated renderer if both used the same target name. If that existing child was created with more permissive webPreferences (via setWindowOpenHandler's overrideBrowserWindowOptions), content loaded by the second renderer inherits those permissions. Apps are only affected if they open multiple top-level windows with differing trust levels and use setWindowOpenHandler to grant child windows elevated webPreferences such as a privileged preload script. Apps that do not elevate child window privileges, or that use a single top-level window, are not affected. Apps that additionally grant nodeIntegration: true or sandbox: false to child windows (contrary to the security recommendations) may be exposed to arbitrary code execution. This vulnerability is fixed in 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
将资源暴露给错误范围
Source: CVE Program / CVE List V5
Vulnerability Title
Electron 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Electron是Electron开源的一个用户编写跨平台桌面应用的 JavaScript 框架。该框架基于 nodejs 和 Chromium 可以使用HTML，CSS实现跨平台桌面应用的编写。 Electron 39.8.5之前版本、40.8.5之前版本、41.1.0之前版本和42.0.0-alpha.5之前版本存在安全漏洞，该漏洞源于命名窗口查找未正确限定范围，可能导致权限提升或任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
electron electron < 39.8.5 -

II. Public POCs for CVE-2026-34765

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III. Intelligence Information for CVE-2026-34765

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IV. Related Vulnerabilities

Same product: electron
Same vendor: electron
Same weakness: CWE-668

V. Comments for CVE-2026-34765

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