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CVE-2026-34774— Electron: Use-after-free in offscreen child window paint callback

CVSS 8.1 · High EPSS 0.02% · P5
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I. Basic Information for CVE-2026-34774

Vulnerability Information
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Vulnerability Title
Electron: Use-after-free in offscreen child window paint callback
Source: NVD (National Vulnerability Database)
Vulnerability Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 39.8.1, 40.7.0, and 41.0.0, apps that use offscreen rendering and allow child windows via window.open() may be vulnerable to a use-after-free. If the parent offscreen WebContents is destroyed while a child window remains open, subsequent paint frames on the child dereference freed memory, which may lead to a crash or memory corruption. Apps are only affected if they use offscreen rendering (webPreferences.offscreen: true) and their setWindowOpenHandler permits child windows. Apps that do not use offscreen rendering, or that deny child windows, are not affected. This issue has been patched in versions 39.8.1, 40.7.0, and 41.0.0.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放后使用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Electron 资源管理错误漏洞
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 39.8.1之前版本、40.7.0之前版本和41.0.0之前版本存在资源管理错误漏洞，该漏洞源于使用离屏渲染并允许通过window.open创建子窗口时存在释放后重用问题，可能导致崩溃或内存损坏。
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

VendorProductAffected VersionsCPESubscribe
electronelectron < 39.8.1 -

II. Public POCs for CVE-2026-34774

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III. Intelligence Information for CVE-2026-34774

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Same Patch Batch · electron · 2026-04-03 · 13 CVEs total

CVE-2026-347697.8 HIGHElectron: Renderer command-line switch injection via undocumented commandLineSwitches webP
CVE-2026-347717.5 HIGHElectron: Use-after-free in WebContents fullscreen, pointer-lock, and keyboard-lock permis
CVE-2026-347707.0 HIGHElectron: Use-after-free in PowerMonitor on Windows and macOS
CVE-2026-347756.8 MEDIUMElectron: nodeIntegrationInWorker not correctly scoped in shared renderer processes
CVE-2026-347675.9 MEDIUMElectron: HTTP Response Header Injection in custom protocol handlers and webRequest
CVE-2026-347785.9 MEDIUMElectron: Service worker can spoof executeJavaScript IPC replies
CVE-2026-347725.8 MEDIUMElectron: Use-after-free in download save dialog callback
CVE-2026-347775.4 MEDIUMElectron: Incorrect origin passed to permission request handler for iframe requests
CVE-2026-347765.3 MEDIUMElectron: Out-of-bounds read in second-instance IPC on macOS and Linux
CVE-2026-347734.7 MEDIUMElectron: Registry key path injection in app.setAsDefaultProtocolClient on Windows
CVE-2026-347683.9 LOWElectron: Unquoted executable path in app.setLoginItemSettings on Windows
CVE-2026-347663.3 LOWElectron: USB device selection not validated against filtered device list

IV. Related Vulnerabilities

Same product: electron
Same vendor: electron
Same weakness: CWE-416

V. Comments for CVE-2026-34774

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