CVE-2020-4076 Context isolation bypass via leaked cross-context objects in Electron
Attackers can bypass context isolation in Electron apps to execute privileged actions from the renderer process, requiring an upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-4076?
CVE-2020-4076 is a high-severity vulnerability in Electronjs Electron, published on 7 Jul 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, there is a context isolation bypass. Code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions. Apps using contextIsolation are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.
Weakness: CWE-501
Which versions are affected by CVE-2020-4076?
4 open source packages ship an affected version, including electron. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
electron npm | All versions | 7.2.4 |
electron npm | All versions | 7.2.4 |
electron npm | From 8.0.0 | 8.2.4 |
electron npm | From 8.0.0 | 8.2.4 |
Products include Electronjs Electron.
How do I fix CVE-2020-4076?
Upgrade electron to a fixed version for your release line: 7.2.4 or 8.2.4.
Is CVE-2020-4076 being exploited?
There is no known exploitation of CVE-2020-4076 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-2026-34780 Electron: Context Isolation bypass via contextBridge VideoFrame transfer
- 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
Sources
Also known as GHSA-m93v-9qjc-3g79.