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CVE-2026-70610

CVE-2026-70610 · Electron: contextBridge object copy honors prototype setters

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 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4, objects copied across the contextBridge boundary from untrusted content could carry an attacker-influenced prototype, enabling prototype-pollution-style attacks against preload code despite context isolation being enabled. Apps are only affected if their preload code accepts object arguments from untrusted content and reads properties from them without own-property checks, while apps that only accept primitive arguments or validate object arguments are not affected. This issue is fixed in 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4.

CVSS 5.4 · Medium · EPSS 0.6% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • electron

    Versions
    • < 39.8.9: Affected
    • >= 40.0.0-alpha.1, < 40.9.2: Affected
    • >= 41.0.0-alpha.1, < 41.2.2: Affected
    • >= 42.0.0-alpha.1, < 42.0.0-beta.4: Affected

    No fix published

  • electron npm

    Affected ranges
    • SEMVER: < 39.8.9

    Update to 39.8.9

  • electron npm

    Affected ranges
    • SEMVER: ≥ 40.0.0-alpha.1, < 40.9.2

    Update to 40.9.2

  • electron npm

    Affected ranges
    • SEMVER: ≥ 41.0.0-alpha.1, < 41.2.2

    Update to 41.2.2

  • electron npm

    Affected ranges
    • SEMVER: ≥ 42.0.0-alpha.1, < 42.0.0-beta.4

    Update to 42.0.0-beta.4

Original sources

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