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Untriaged
Permalink CVE-2026-34774
8.1 HIGH
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): HIGH
  • Privileges required (PR): NONE
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): HIGH
  • Integrity impact (I): HIGH
  • Availability impact (A): HIGH
created 1 week, 1 day ago
Electron: Use-after-free in offscreen child window paint callback

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.

Affected products

electron
  • ==>= 41.0.0-alpha.1, < 41.0.0
  • ==< 39.8.1
  • ==>= 40.0.0-alpha.1, < 40.7.0

Matching in nixpkgs

pkgs.electron_35

Cross platform desktop application shell

pkgs.electron_36

Cross platform desktop application shell

pkgs.gfn-electron

Linux Desktop client for Nvidia's GeForce NOW game streaming service

pkgs.electron-mail

ElectronMail is an Electron-based unofficial desktop client for ProtonMail