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

April 3, 2026 (updated April 6, 2026)

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.

References

github.com/advisories/GHSA-jjp3-mq3x-295m
github.com/electron/electron
github.com/electron/electron/security/advisories/GHSA-jjp3-mq3x-295m
nvd.nist.gov/vuln/detail/CVE-2026-34770

Code Behaviors & Features

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