p PatchFirst

CVE-2026-70612

CVE-2026-70612 · Electron: Sandboxed iframes can launch external protocol handlers

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 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, requests to open external protocol URLs from web content did not take iframe sandbox restrictions into account, so a sandboxed iframe could cause an OS-registered external application to be launched. The frame sandbox state was also not made available to the app permission handlers, affecting apps that render untrusted content in sandboxed iframes and grant the openExternal permission by default when no setPermissionRequestHandler is installed. This issue is fixed in 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.

CVSS 5.4 · Medium · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • electron

    Versions
    • < 39.8.8: Affected
    • >= 40.0.0-alpha.1, < 40.9.0: Affected
    • >= 41.0.0-alpha.1, < 41.2.1: Affected
    • >= 42.0.0-alpha.1, < 42.0.0-beta.3: Affected

    No fix published

  • electron npm

    Affected ranges
    • SEMVER: < 39.8.8

    Update to 39.8.8

  • electron npm

    Affected ranges
    • SEMVER: ≥ 40.0.0-alpha.1, < 40.9.0

    Update to 40.9.0

  • electron npm

    Affected ranges
    • SEMVER: ≥ 41.0.0-alpha.1, < 41.2.1

    Update to 41.2.1

  • electron npm

    Affected ranges
    • SEMVER: ≥ 42.0.0-alpha.1, < 42.0.0-beta.3

    Update to 42.0.0-beta.3

Original sources

Check your server →