Microsoft UFO 3.0.1-4-ge2626659 TASK Message send_task_end authorization

Summaryinfo

A vulnerability, which was classified as problematic, was found in Microsoft UFO 3.0.1-4-ge2626659. This affects the function send_task_end of the component TASK Message Handler. Executing a manipulation can lead to authorization. This vulnerability is registered as CVE-2026-46544. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Microsoft UFO 3.0.1-4-ge2626659. It has been declared as problematic. This vulnerability affects the function send_task_end of the component TASK Message Handler. The manipulation with an unknown input leads to a authorization vulnerability. The CWE definition for the vulnerability is CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. As an impact it is known to affect confidentiality. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-46544 since 05/14/2026. The exploitation appears to be difficult. The attack can be initiated remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 05/28/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Microsoft

Name

• UFO

Version

• 3.0.1-4-ge2626659

License

• commercial

Website

• Vendor: https://www.microsoft.com/
• Product: https://github.com/microsoft/UFO/

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