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CVE-2026-70610

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS.

Impact

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4, objects copied across the contextBridge boundary from untrusted content could carry an attacker-influenced prototype, enabling prototype-pollution-style attacks against preload code despite context isolation being enabled. Apps are only affected if their preload code accepts object arguments from untrusted content and reads properties from them without own-property checks, while apps that only accept primitive arguments or validate object arguments are not affected. This issue is fixed in 39.8.9, 40.9.2, 41.2.2, and 42.0.0-beta.4.

Affected packages

EcosystemPackageAffectedFixed in
npmelectron< 39.8.939.8.9

Affected products

VendorProductAffected versions
ElectronjsElectron
before 39.8.9
from 40.0.0 before 40.9.2
from 41.0.0 before 41.2.2
Version 42.0.0

Weakness classification

CWE-1321

References