CVE-2026-34770

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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."}, {"lang": "es", "value": "Electron es un framework para escribir aplicaciones de escritorio multiplataforma usando JavaScript, HTML y CSS. Antes de las versiones 38.8.6, 39.8.1, 40.8.0 y 41.0.0-beta.8, las aplicaciones que usan el m\u00f3dulo powerMonitor pueden ser vulnerables a un uso despu\u00e9s de liberaci\u00f3n. Despu\u00e9s de que el objeto nativo PowerMonitor es recolectado por el recolector de basura, los recursos asociados a nivel del SO (una ventana de mensaje en Windows, un gestor de apagado en macOS) retienen referencias colgantes. Un evento posterior de cambio de sesi\u00f3n (Windows) o un apagado del sistema (macOS) desreferencia la memoria liberada, lo que puede llevar a un fallo o corrupci\u00f3n de memoria. Todas las aplicaciones que acceden a los eventos de powerMonitor (suspender, reanudar, pantalla de bloqueo, etc.) est\u00e1n potencialmente afectadas. El problema no es directamente controlable por el renderizador. Este problema ha sido parcheado en las versiones 38.8.6, 39.8.1, 40.8.0 y 41.0.0-beta.8."}], "id": "CVE-2026-34770", "lastModified": "2026-07-24T22:10:00.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "security-advisories@github.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34770", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-04-07T00:00:00+00:00", "version": "2.0.3"}}]}, "published": "2026-04-04T00:16:17.823", "references": [{"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/electron/electron/security/advisories/GHSA-jjp3-mq3x-295m"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,38.8.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[39.0.0-alpha.1,39.8.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[40.0.0-alpha.1,40.8.0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[41.0.0-alpha.1,41.0.0-beta.8)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "electron", "source": "cna", "vendor": "electron"}, "product": "electron", "vendor": "electron"}], "analysis": {"en": {"generated_at": "2026-04-04T03:51:21.312402+00:00", "value": {"mitigation_remediation": ["Update Electron to version 38.8.6, 39.8.1, 40.8.0, 41.0.0\u2011beta.8, or any later release that contains the patch.", "Verify that powerMonitor events continue to function correctly after the upgrade to confirm the fix.", "If an upgrade is not immediately possible, avoid using the powerMonitor module or ensure that all listeners are removed before the application terminates to prevent dangling references.", "Continuously monitor Electron security advisories for updates or additional guidance."], "summary": {"action": "Immediate Patch", "impact": "Memory Corruption"}, "threat_synthesis": {"affected_systems": "The vulnerability affects Electron releases prior to 38.8.6, 39.8.1, 40.8.0, and 41.0.0\u2011beta.8. All desktop applications built with the Electron framework that consume powerMonitor events\u2014suspend, resume, lock\u2011screen, etc.\u2014are potentially impacted. The defect resides in Electron\u2019s core and is present on both Windows and macOS platforms.", "description_and_impact": "Electron applications that register for powerMonitor events are vulnerable to a use-after-free flaw (CWE\u2011416). The bug occurs when the native PowerMonitor object is garbage\u2011collected while the OS\u2011level resources it created\u2014such as a Windows message window or a macOS shutdown handler\u2014retain dangling references. A subsequent session\u2011change event on Windows or system shutdown on macOS dereferences freed memory, potentially causing a crash or memory corruption.", "risk_and_exploitability": "The CVSS score of 7.0 indicates high severity. EPSS data is not available and the vulnerability is not listed in the CISA KEV catalog, implying no publicly documented exploits. Based on the description, it is inferred that the likely attack vector involves triggering a system session\u2011change event or a shutdown, which typically would require local or privileged access. Therefore, while the impact of a crash or memory corruption could be significant, the likelihood of exploitation is limited to environments where an attacker can manipulate these OS\u2011level events."}}}}, "created": "2026-04-06T21:21:40.453239+00:00", "updated": "2026-04-06T22:21:18.160415+00:00", "vendors": ["electron", "electron$PRODUCT$electron"]}