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

7 / 10

HIGH

CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Basic Information

ID CVE-2026-34770

Source GitHub_M

Published Apr 3, 2026 at 23:46

Modified Apr 8, 2026 at 03:55

Affected Product

Vendor electron

Product electron

Version < 38.8.6

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

CWE Classification

CWE-416

References

github.com /electron/electron/security/advisories/GHSA-jjp3-mq3x-295m

{
    "lastseen": "",
    "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.",
    "published": "2026-04-03T23:46:11.095Z",
    "modified": "2026-04-08T03:55:36.380Z",
    "type": "cve",
    "title": "Electron: Use-after-free in PowerMonitor on Windows and macOS",
    "source": "GitHub_M",
    "references": "https://github.com/electron/electron/security/advisories/GHSA-jjp3-mq3x-295m",
    "id": "CVE-2026-34770",
    "bulletinFamily": "",
    "cwe": [
        "CWE-416"
    ],
    "cvelist": null,
    "sourceData": "electron electron < 38.8.6\nelectron electron >= 39.0.0-alpha.1, < 39.8.1\nelectron electron >= 40.0.0-alpha.1, < 40.8.0\nelectron electron >= 41.0.0-alpha.1, < 41.0.0-beta.8",
    "sourceHref": "",
    "cvss": {
        "score": 7,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "electron",
    "version": "< 38.8.6",
    "vendor": "electron",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}