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CVE-2026-102673

CVE-2026-102673 · Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab

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 41.10.4, 42.5.2, and 43.0.0, popups opened from a sandboxed iframe through Electron's OpenURLFromTab navigation path, including links using target="_blank" or a middle-click, did not receive the inherited HTML sandbox restrictions. An untrusted iframe using the allow-scripts allow-popups configuration could therefore open a popup with the embedding application's full origin, exposing that origin's cookies, storage, and same-origin scripting capabilities. Applications that do not embed untrusted content in sandboxed iframes are not affected. This issue is fixed in versions 41.10.4, 42.5.2, and 43.0.0.

CVSS 8.2 · High · EPSS 0.1% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • electron

    Versions
    • < 41.10.4: Affected
    • >= 42.0.0-alpha.1, < 42.5.2: Affected
    • >= 43.0.0-alpha.1, < 43.0.0: Affected

    No fix published

  • electron npm

    Affected ranges
    • SEMVER: < 41.10.4

    Update to 41.10.4

  • electron npm

    Affected ranges
    • SEMVER: ≥ 42.0.0-alpha.1, < 42.5.2

    Update to 42.5.2

  • electron npm

    Affected ranges
    • SEMVER: ≥ 43.0.0-alpha.1, < 43.0.0

    Update to 43.0.0

Original sources

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