PT-2026-30007 · Npm · Electron

Published 2026-04-03 · Updated 2026-04-03 · CVE-2026-34777

OSV

CVSS v3.1

5.4

Medium

AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Impact

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.

Workarounds

In your setPermissionRequestHandler, inspect details.requestingUrl rather than the origin parameter or webContents.getURL() when deciding whether to grant fullscreen, pointerLock, keyboardLock, openExternal, or media permissions.

Fixed Versions

• 41.0.0
• 40.8.1
• 39.8.1
• 38.8.6

For more information

If there are any questions or comments about this advisory, please email [e-mail]

Fix

Origin Validation Error

Weakness Enumeration

CWE-346

Related Identifiers

CVE-2026-34777

GHSA-R5P7-GP4J-QHRX

Affected Products

Electron

References · 3

• https://osv.dev/vulnerability/GHSA-r5p7-gp4j-qhrx · Vendor Advisory
• https://github.com/electron/electron · Note
• https://github.com/electron/electron/security/advisories/GHSA-r5p7-gp4j-qhrx · Note