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CVE-2026-34780

CVE-2026-34780 · Electron: Context Isolation bypass via contextBridge VideoFrame transfer

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. From versions 39.0.0-alpha.1 to before 39.8.0, 40.0.0-alpha.1 to before 40.7.0, and 41.0.0-alpha.1 to before 41.0.0-beta.8, apps that pass VideoFrame objects (from the WebCodecs API) across the contextBridge are vulnerable to a context isolation bypass. An attacker who can execute JavaScript in the main world (for example, via XSS) can use a bridged VideoFrame to gain access to the isolated world, including any Node.js APIs exposed to the preload script. Apps are only affected if a preload script returns, resolves, or passes a VideoFrame object to the main world via contextBridge.exposeInMainWorld(). Apps that do not bridge VideoFrame objects are not affected. This issue has been patched in versions 39.8.0, 40.7.0, and 41.0.0-beta.8.

CVSS 8.4 · High · EPSS 0.4% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • electron

    Versions
    • >= 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: ≥ 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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