CVE-2026-34777

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.

The following products are affected by CVE-2026-34777 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-34777.

URL	Resource
https://github.com/electron/electron/security/advisories/GHSA-r5p7-gp4j-qhrx
https://nvd.nist.gov/vuln/detail/CVE-2026-34777
https://www.cve.org/CVERecord?id=CVE-2026-34777