Is CVE-2026-34777 actively exploited?

No active exploitation of CVE-2026-34777 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-34777 be exploited remotely?

Yes. CVE-2026-34777 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-34777?

CVE-2026-34777 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2026-34777

CWE-346Published: April 4, 2026· Updated: Apr 7, 2026

5.4

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:2.7th

Official 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, 40.8.1, and 41.0.0, when an iframe requests fullscreen, pointerLock, keyboardLock, openExternal, or media permissions, the origin passed to session.setPermissionRequestHandler() was the top-level page's origin rather than the requesting iframe's origin. Apps that grant permissions based on the origin parameter or webContents.getURL() may inadvertently grant permissions to embedded third-party content. The correct requesting URL remains available via details.requestingUrl. Apps that already check details.requestingUrl are not affected. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.

NVD Source

Technical Analysis

CVE-2026-34777 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.