CVE-2026-46538
Microsoft UFO accepts cross-device TASK_END messages by session_id only, allowing peer task-result injection
Description
Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO's constellation client tracks pending task responses by session_id only and does not verify that a TASK_END message came from the device that originally received the task. When the constellation sends a task to a target device, it records a pending Future under a session key. The pending task record stores the expected device ID, but the completion path ignores that binding. If another authenticated peer device sends a forged TASK_END with the same session_id, the constellation accepts the response and completes the victim device's pending Future with attacker-controlled result data. This is an authenticated cross-device task-result injection issue.
INFO
Published Date :
May 27, 2026, 9:56 p.m.
Last Modified :
May 27, 2026, 9:56 p.m.
Remotely Exploit :
No
Source :
GitHub_M
Affected Products
The following products are affected by CVE-2026-46538
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update Microsoft UFO to a version addressing the vulnerability.
- Verify task responses originate from the correct device.
- Ensure session IDs are validated with device IDs.
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