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CVE-2026-34771

CVE-2026-34771 · Electron: Use-after-free in WebContents fullscreen, pointer-lock, and keyboard-lock permission callbacks

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 7.5 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • electron

    Versions
    • < 38.8.6: Affected
    • >= 39.0.0-alpha.1, < 39.8.0: Affected
    • >= 40.0.0-alpha.1, < 40.7.0: Affected
    • >= 41.0.0-alpha.1, < 41.0.0-beta.8: Affected

    No fix published

  • electron npm

    Affected ranges
    • SEMVER: < 38.8.6

    Update to 38.8.6

  • electron npm

    Affected ranges
    • SEMVER: ≥ 39.0.0-alpha.1, < 39.8.0

    Update to 39.8.0

  • electron npm

    Affected ranges
    • SEMVER: ≥ 40.0.0-alpha.1, < 40.7.0

    Update to 40.7.0

  • electron npm

    Affected ranges
    • SEMVER: ≥ 41.0.0-alpha.1, < 41.0.0-beta.8

    Update to 41.0.0-beta.8

Original sources

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