CVE-2026-34776 in Electron

Sumário (Inglês)

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, on macOS and Linux, apps that call app.requestSingleInstanceLock() were vulnerable to an out-of-bounds heap read when parsing a crafted second-instance message. Leaked memory could be delivered to the app's second-instance event handler. This issue is limited to processes running as the same user as the Electron app. Apps that do not call app.requestSingleInstanceLock() are not affected. Windows is not affected by this issue. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.

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Responsável

GitHub_M

Reservar

30/03/2026

Divulgação

04/04/2026

Estado

Confirmado

Inscrições

VulDB provides additional information and datapoints for this CVE:

ID	Vulnerabilidade	CWE	Exp	Con	CVE
355219	Electron Instance Message app.requestSingleInstanceLock Divulgação de Informação	125	Não definido	Correção oficial	CVE-2026-34776

Fontes

• MITRE
• NVD
• CVE Details