What’s Vulnerable › Vulnerabilities

CVE-2020-4076: Context isolation bypass via leaked cross-context objects in Electron

• Severity: critical (CVSS 9.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-07-07 · updated 2026-06-17
• Weakness: CWE-501

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.

Affected products

• electron: from 7.0.0 before 7.2.4; from 8.0.0 before 8.2.4; 9.0.0, 9.0.0-beta1, 9.0.0-beta10, 9.0.0-beta11, 9.0.0-beta12, 9.0.0-beta13 (+15) — fixed in 7.2.4, 8.2.4

How to fix

Upgrade to a fixed version: electron 7.2.4, 8.2.4. Check the vendor advisory for mitigations.

References

• https://github.com/electron/electron/security/advisories/GHSA-m93v-9qjc-3g79
• https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824
• https://github.com/electron/electron/security/advisories/GHSA-m93v-9qjc-3g79
• https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824

Get alerted when CVE-2020-4076 or the next vulnerability affects your stack