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

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.

Scores

EPSS (exploitation in 30 days)

0.25% · top 84% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.0.

Weakness

• CWE-416: Use After Free (opens in a new tab)All about CWE-416 and its CVEs

Affected products

• electron · electron

  • affected < 38.8.6
  • affected >= 39.0.0-alpha.1, < 39.8.1
  • affected >= 40.0.0-alpha.1, < 40.8.0
  • affected >= 41.0.0-alpha.1, < 41.0.0-beta.8

Affected packages

From reviewed advisories of the GitHub Advisory Database.

• npmelectronGHSA-jjp3-mq3x-295m (opens in a new tab)

References (1)

• https://github.com/electron/electron/security/advisories/GHSA-jjp3-mq3x-295m (opens in a new tab)x_refsource_CONFIRM

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisory GHSA-jjp3-mq3x-295m (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-34770](https://trackcve.app/badge/CVE-2026-34770.svg)](https://trackcve.app/cve/CVE-2026-34770)

Record last updated 8 Apr 2026, 03:55 UTC.