CVE-2026-34777

Electron: Incorrect origin passed to permission request handler for iframe requests

State: Published
Severity: 5.4 Medium
Published: Apr 3, 2026
Updated: Apr 6, 2026
Reserved: Mar 30, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-346 Origin Validation Error

Affected Products

Product	Versions
electronelectron	< 38.8.6Affected >= 39.0.0-alpha.1, < 39.8.1Affected >= 40.0.0-alpha.1, < 40.8.1Affected >= 41.0.0-alpha.1, < 41.0.0Affected

References

https://github.com/electron/electron/security/advisories/GHSA-r5p7-gp4j-qhrx

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