CVE-2026-34780 Electron: Context Isolation bypass via contextBridge VideoFrame transfer
Attackers can bypass context isolation in Electron apps using bridged VideoFrame objects to access Node.js APIs, requiring an upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-34780?
CVE-2026-34780 is a high-severity vulnerability in Electronjs Electron, published on 4 Apr 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
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.
Which versions are affected by CVE-2026-34780?
6 open source packages ship an affected version, including electron. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
electron npm | From 39.0.0-alpha.1 | 39.8.0 |
electron npm | From 39.0.0-alpha.1 | 39.8.0 |
electron npm | From 40.0.0-alpha.1 | 40.7.0 |
electron npm | From 40.0.0-alpha.1 | 40.7.0 |
electron npm | From 41.0.0-alpha.1 | 41.0.0-beta.8 |
electron npm | From 41.0.0-alpha.1 | 41.0.0-beta.8 |
Products include Electronjs Electron.
How do I fix CVE-2026-34780?
Upgrade electron to a fixed version for your release line: 39.8.0, 40.7.0 or 41.0.0-beta.8.
Is CVE-2026-34780 being exploited?
There is no known exploitation of CVE-2026-34780 in the wild and no public exploit code.
Other vulnerabilities in Electronjs Electron
- CVE-2017-16151 Chromium Remote Code Execution in electron
- CVE-2018-1000118 Electron protocol handler browser vulnerable to Command Injection
- CVE-2026-102676 Electron: <webview> can enable Node.js integration in Web Workers despite embedder restrictions
- CVE-2026-102673 Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab
- CVE-2026-102674 Electron: Windows opened from a sandboxed top-level document do not inherit its sandbox restrictions
Sources
Also known as GHSA-jfqg-hf23-qpw2.