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GHSA-r5p7-gp4j-qhrx

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

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-34777

Packages

EcosystemPackageAffectedFixed in
npm electron < 38.8.6 38.8.6
npm electron >= 39.0.0-alpha.1, < 39.8.1 39.8.1
npm electron >= 40.0.0-alpha.1, < 40.8.1 40.8.1
npm electron >= 41.0.0-alpha.1, < 41.0.0 41.0.0

Details

As written in the advisory (Markdown source, shown as plain text).

### 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 [[email protected]](mailto:[email protected])

References

External links from the advisory. They lead to third-party sites.