# CVE-2026-105792: Microsoft UFO deadlock in task result endpoint

Source: https://junglewise.ai/threats/cve-2026-105792-microsoft-ufo-is-an-open-source-framework-for-intelligent  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-06. Updated: 2026-10-06  
License: CC BY 4.0 with a link back

CVE-2026-105792 · Severity: medium · CVSS 6.5 · Published 2026-10-06

Microsoft UFO is an intelligent automation framework that runs tasks across devices and platforms. A flaw in the task result API endpoint allows an authenticated attacker to deadlock the server's event loop by requesting results for a specially crafted task name, causing the server to become unresponsive to all HTTP, WebSocket, and background operations until restarted.

Technologies: [Microsoft UFO](https://junglewise.ai/threats/technologies/ufo). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-105792 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105792 being exploited in the wild.

**How severe is CVE-2026-105792?** Medium severity, with a CVSS score of 6.5, published 6 October 2026.

**Which products and versions are affected?** Microsoft UFO before 3.0.9.

**Is there a fix for CVE-2026-105792?** Yes: fixed in 3.0.9. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-105792 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-105792?** Check whether you run Microsoft UFO at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 3.0.9

## Technical details

The /api/task_result/{task_name} endpoint in ufo/server/services/session_manager.py attempts to acquire a non-reentrant lock twice when processing a task name that maps to an existing session—first in get_result_by_task() and again in the nested get_result() call—causing a deadlock. An authenticated attacker who knows or creates a mapped task name can trigger this condition. In the default single-process server configuration, the blocked event-loop thread prevents other requests and background tasks from executing.

## Affected products

- Microsoft UFO before 3.0.9

## Timeline

- 2026-10-06: disclosed
- 2026-09-14: patched

## References

- [https://github.com/microsoft/UFO/commit/0eeb792333ce76c856bc1c8b05fd65fc26bd3c50](https://github.com/microsoft/UFO/commit/0eeb792333ce76c856bc1c8b05fd65fc26bd3c50)
- [https://github.com/microsoft/UFO/releases/tag/v3.0.9](https://github.com/microsoft/UFO/releases/tag/v3.0.9)

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