CVE-2026-34771

The record

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that register an asynchronous session.setPermissionRequestHandler() may be vulnerable to a use-after-free when handling fullscreen, pointer-lock, or keyboard-lock permission requests. If the requesting frame navigates or the window closes while the permission handler is pending, invoking the stored callback dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not set a permission request handler, or whose handler responds synchronously, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.

Affected packages

Related vulnerabilities

• GHSA-8337-3p73-46f4 Electron: Use-after-free in WebContents fullscreen, pointer-lock, and keyboard-lock… Same vulnerability
• CVE-2026-54257 Electron is a framework for writing cross-platform desktop applications using JavaScript… Also affects electron
• GHSA-q6m5-f73j-m9mc Electron: Buffer performs incorrect byte length calculations resulting in heap buffer… Also affects electron
• CVE-2026-34781 Electron is a framework for writing cross-platform desktop applications using JavaScript… Also affects electron
• CVE-2026-34765 Electron is a framework for writing cross-platform desktop applications using JavaScript… Also affects electron
• GHSA-f37v-82c4-4x64 Electron: Crash in clipboard.readImage() on malformed clipboard image data Also affects electron
• GHSA-f3pv-wv63-48x8 Electron: Named window.open targets not scoped to the opener's browsing context Also affects electron
• CVE-2026-34764 Electron is a framework for writing cross-platform desktop applications using JavaScript… Also affects electron