CVE-2020-4077 Context isolation bypass via contextBridge in Electron
Attackers can bypass context isolation in Electron apps using contextBridge to execute privileged actions from the renderer process.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-4077?
CVE-2020-4077 is a high-severity vulnerability in Electronjs Electron, published on 7 Jul 2020. Any signed-in user can exploit it over the 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 both `contextIsolation` and `contextBridge` 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-2020-4077?
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-2020-4077?
Upgrade electron to a fixed version for your release line: 7.2.4 or 8.2.4.
Is CVE-2020-4077 being exploited?
There is no known exploitation of CVE-2020-4077 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-h9jc-284h-533g.