CVE-2020-4077: Context isolation bypass via contextBridge in Electron
First published: Tue Jul 07 2020(Updated: )
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.
Credit: security-advisories@github.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Electronjs Electron | >=7.0.0<7.2.4 | |
| Electronjs Electron | >=8.0.0<8.2.4 | |
| Electronjs Electron | =9.0.0 | |
| Electronjs Electron | =9.0.0-beta1 | |
| Electronjs Electron | =9.0.0-beta10 | |
| Electronjs Electron | =9.0.0-beta11 | |
| Electronjs Electron | =9.0.0-beta12 | |
| Electronjs Electron | =9.0.0-beta13 | |
| Electronjs Electron | =9.0.0-beta14 | |
| Electronjs Electron | =9.0.0-beta15 | |
| Electronjs Electron | =9.0.0-beta16 | |
| Electronjs Electron | =9.0.0-beta17 | |
| Electronjs Electron | =9.0.0-beta18 | |
| Electronjs Electron | =9.0.0-beta19 | |
| Electronjs Electron | =9.0.0-beta2 | |
| Electronjs Electron | =9.0.0-beta20 | |
| Electronjs Electron | =9.0.0-beta3 | |
| Electronjs Electron | =9.0.0-beta4 | |
| Electronjs Electron | =9.0.0-beta5 | |
| Electronjs Electron | =9.0.0-beta6 | |
| Electronjs Electron | =9.0.0-beta7 | |
| Electronjs Electron | =9.0.0-beta8 | |
| Electronjs Electron | =9.0.0-beta9 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is CVE-2020-4077?
CVE-2020-4077 is a vulnerability in Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21 that allows code running in the main world context in the renderer to reach into the isolated Electron context and perform privileged actions.
What is the severity of CVE-2020-4077?
The severity of CVE-2020-4077 is critical with a CVSS score of 9.9.
Which software versions are affected by CVE-2020-4077?
The affected software versions are Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21.
How can I fix CVE-2020-4077?
To fix CVE-2020-4077, you should update Electron to version 7.2.4, 8.2.4, or 9.0.0-beta21 or later.
Where can I find more information about CVE-2020-4077?
You can find more information about CVE-2020-4077 on the Electron GitHub Security Advisory page and the Electron release notes page.
- collector/nvd-index
- agent/type
- agent/references
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/weakness
- agent/title
- agent/author
- agent/severity
- agent/tags
- agent/first-publish-date
- agent/last-modified-date
- agent/event
- agent/description
- vendor/electronjs
- canonical/electronjs electron
- version/electronjs electron/7.0.0
- version/electronjs electron/8.0.0
- version/electronjs electron/9.0.0
- version/electronjs electron/9.0.0-beta1
- version/electronjs electron/9.0.0-beta10
- version/electronjs electron/9.0.0-beta11
- version/electronjs electron/9.0.0-beta12
- version/electronjs electron/9.0.0-beta13
- version/electronjs electron/9.0.0-beta14
- version/electronjs electron/9.0.0-beta15
- version/electronjs electron/9.0.0-beta16
- version/electronjs electron/9.0.0-beta17
- version/electronjs electron/9.0.0-beta18
- version/electronjs electron/9.0.0-beta19
- version/electronjs electron/9.0.0-beta2
- version/electronjs electron/9.0.0-beta20
- version/electronjs electron/9.0.0-beta3
- version/electronjs electron/9.0.0-beta4
- version/electronjs electron/9.0.0-beta5
- version/electronjs electron/9.0.0-beta6
- version/electronjs electron/9.0.0-beta7
- version/electronjs electron/9.0.0-beta8
- version/electronjs electron/9.0.0-beta9