CVE-2026-46544 — Microsoft UFO reuses client-supplied WebSocket session IDs and replays stale task results to new authenticated requesters
Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO accepts client-supplied session_id values in Web…
Published: 2026-05-27 · CVSS: 5.3 · CVSS 3.1
Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO accepts client-supplied session_id values in WebSocket task messages and reuses an existing in-memory session object if that session_id already exists. If a prior session has completed and remains in memory with populated results, a different authenticated client can send a new TASK message using the same session_id. The server re-enters the existing session object and sends the stale stored result to the new requester through the normal send_task_end() callback path. This is an authenticated cross-client stale result replay issue. The issue requires that the attacker knows or can predict a live or recently completed session_id.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7