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OpenAdvisories
High · 7.0 CVE-2026-34770 EUVD-2026-18939GHSA-jjp3-mq3x-295m

Electron: Use-after-free in PowerMonitor on Windows and macOS

Published Apr 3, 2026 · Updated Apr 8, 2026 · Assigned by GitHub_M

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8, apps that use the powerMonitor module may be vulnerable to a use-after-free. After the native PowerMonitor object is garbage-collected, the associated OS-level resources (a message window on Windows, a shutdown handler on macOS) retain dangling references. A subsequent session-change event (Windows) or system shutdown (macOS) dereferences freed memory, which may lead to a crash or memory corruption. All apps that access powerMonitor events (suspend, resume, lock-screen, etc.) are potentially affected. The issue is not directly renderer-controllable. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8.

Affected products

VendorProductAffectedFixed
electron electron < 38.8.6, >= 39.0.0-alpha.1, < 39.8.1, >= 40.0.0-alpha.1, < 40.8.0, >= 41.0.0-alpha.1, < 41.0.0-beta.8 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm electron < 38.8.6 38.8.6 GHSA-jjp3-mq3x-295m
npm electron >= 39.0.0-alpha.1, < 39.8.1 39.8.1 GHSA-jjp3-mq3x-295m
npm electron >= 40.0.0-alpha.1, < 40.8.0 40.8.0 GHSA-jjp3-mq3x-295m
npm electron >= 41.0.0-alpha.1, < 41.0.0-beta.8 41.0.0-beta.8 GHSA-jjp3-mq3x-295m

References