Preliminary research
Confused Deputy: Google IdP Universal Account Takeover via Device Code Flow Hijacking
AI-collected research leads through 6 October 2026, including bounded month-by-month reviews of selected social and community sources from January through September. Unranked, incomplete, not community-vetted, and subject to change.
Google's device flow exposed a transferable sign-in challenge and failed to bind client_id or scope to the issued device_code. Substituting a previously approved client and prompt=none silently yielded attacker-polled tokens, with Gmail access and reauthentication paths extending the account-takeover chain.
Record
- Researcher
- Mohamed Benchikh
- Published by
- weirdmachine64
- Date
In the archive
Tags
This page is the archive's own catalogue record. The research is the work of Mohamed Benchikh, first published at the original source. Preserved copies are kept so the citation survives its host.