MediumGHSA-r5p7-gp4j-qhrxCVE-2026-34777

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

Published 3 Apr 2026 · Updated 6 Apr 2026

Affected packages

electronnpm
Affected
<38.8.6
Fixed in
38.8.6
Update to the fixed version for your release line, for example:npm install electron@38.8.6
electronnpm
Affected
>=39.0.0-alpha.1 <39.8.1
Fixed in
39.8.1
Update to the fixed version for your release line, for example:npm install electron@39.8.1
electronnpm
Affected
>=40.0.0-alpha.1 <40.8.1
Fixed in
40.8.1
Update to the fixed version for your release line, for example:npm install electron@40.8.1
electronnpm
Affected
>=41.0.0-alpha.1 <41.0.0
Fixed in
41.0.0
Update to the fixed version for your release line, for example:npm install electron@41.0.0

Details

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 [security@electronjs.org](mailto:security@electronjs.org)

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References

Advisory data from OSV.dev (opens OSV.dev in a new tab), refreshed daily.