GHSA-h9jc-284h-533g CVE-2020-4077

Context isolation bypass via contextBridge in Electron

High npm

Severity: 7.7 / 10; High · CVSS 3.1
Exploit chance (EPSS): 1.00%; Chance of exploitation in the next 30 days. Higher than 62.96% of scored vulnerabilities.
Known exploited: No; Not in CISA's catalog
Weakness: CWE-501 Trust Boundary Violation
Fix: 7.2.4; Upgrade electron to this version or later

Description

Impact

Apps using both contextIsolation and contextBridge are affected.

This is a context isolation bypass, meaning that code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions.

Workarounds

There are no app-side workarounds, you must update your Electron version to be protected.

Fixed Versions

9.0.0-beta.21
8.2.4
7.2.4

For more information

If you have any questions or comments about this advisory:

Email us at security@electronjs.org

Affected versions

npm

Package	Vulnerable	Fixed in
electron	`< 7.2.4`	`7.2.4`
electron	`>= 8.0.0, < 8.2.4`	`8.2.4`

How to fix

Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.

electron npm → `7.2.4`

npm

npm install electron@7.2.4

yarn

yarn add electron@7.2.4

pnpm

pnpm add electron@7.2.4

Severity breakdown

CVSS 3.1 7.7

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Attack vector: Network
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Changed
Confidentiality: None
Integrity: High
Availability: None

Weakness

CWE-501: Trust Boundary Violation

The product mixes trusted and untrusted data in the same data structure or structured message.

References

Advisories

nvd.nist.gov/vuln/detail/CVE-2020-4077

Timeline

Jul 7, 2020 Published
Jul 8, 2026 Last updated by the source
Nov 1, 2026 Latest EPSS score

Advisory	Severity	Why it's related
GHSA-qqvq-6xgj-jw8g Electron affected by libvpx's heap buffer overflow in vp8 encoding	High Known exploited	Also affects electron
GHSA-j7hp-h8jx-5ppr libwebp: OOB write in BuildHuffmanTable	High Known exploited	Also affects electron
GHSA-995f-9x5r-2rcj Heap buffer overflow in GPU	Critical Known exploited	Also affects electron
GHSA-jr5w-w6x2-84p9 Electron: Mitigation for compromised eMudhra intermediate certificates	High	Also affects electron
GHSA-h3v5-h239-pg29 Electron: Off-screen rendering on macOS trusts GPU-supplied frame geometry	Low	Also affects electron
GHSA-3qxv-5xgr-q7w9 Electron: Frame subscription trusts GPU-supplied frame geometry	Low	Also affects electron
GHSA-997q-gvvc-jwmx Electron: openExternal permission requests can be attributed to the wrong origin	Medium	Also affects electron
GHSA-fw47-9c62-h3vw Electron: HID and USB permission checks can be attributed to the wrong origin	Medium	Also affects electron

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