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Vulnerability · Published Apr 3, 2026 · Assigned by GitHub_M

CVE-2026-34770Electron: Use-after-free in PowerMonitor on Windows and macOS

High 7.0

In plain English

A high-severity use-after-free in electron from electron. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.0High
Exploit odds (30 days)0.2%top 83.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

EcosystemPackageFixed inAdvisory
npmelectron38.8.6GHSA-jjp3-mq3x-295m
npmelectron39.8.1GHSA-jjp3-mq3x-295m
npmelectron40.8.0GHSA-jjp3-mq3x-295m
npmelectron41.0.0-beta.8GHSA-jjp3-mq3x-295m

Affected products (as reported)

VendorProductVersions
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

Weakness: CWE-416 · Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

References