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CVE-2020-4076

Context isolation bypass via leaked cross-context objects in Electron

CRITICAL
9
CVSS Score
Published: July 7, 2020 at 12:05 AM UTC
Updated: June 17, 2026 at 03:19 AM UTC
2 products affected across 2 vendorsElectronElectron

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Severity
CRITICAL9
Exploit prediction
EPSS 0.4%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Electron· Electronjsnpm
95%
7.0.0 ≤ v < 7.2.48.0.0 ≤ v < 8.2.49.0.09.0.0 beta19.0.0 beta109.0.0 beta119.0.0 beta129.0.0 beta139.0.0 beta149.0.0 beta159.0.0 beta169.0.0 beta179.0.0 beta189.0.0 beta199.0.0 beta29.0.0 beta209.0.0 beta39.0.0 beta49.0.0 beta59.0.0 beta69.0.0 beta79.0.0 beta89.0.0 beta9
Affected range stops below 7.2.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.2.4, so it looks safe — our inference, not a vendor statement
Electron· Electron
60%
v ≤ 9.0.0-beta.20v < 7.2.4v < 8.2.4
Affected range stops below 7.2.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.2.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_CONFIRMThird Party Advisory
Source: [email protected]
https://github.com/electron/electron/security/advisories/GHSA-m93v-9qjc-3g79
x_refsource_MISCRelease NotesVendor Advisory
Source: [email protected]
https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824

CVSS

9CRITICAL[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-501NVD-CWE-Other

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