Read the docs
TI-2026-68445 Aliases CVE-2026-105792

Deadlock in Microsoft UFO server session manager task results

Priority MEDIUM 62CWE-833Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

Microsoft UFO before 3.0.9 has a deadlock (CWE-833) in its task result endpoint, where a non-reentrant lock is acquired twice. An authenticated user with low privileges who knows or creates a mapped task name can block the request indefinitely. In the default single-process server, the blocked event loop also stops other HTTP and WebSocket interactions.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

Microsoft UFO is an open-source framework for intelligent automation across devices and platforms. Prior to 3.0.9, the /api/task_result/{task_name} endpoint calls SessionManager.get_result_by_task() in ufo/server/services/session_manager.py, which acquires a non-reentrant lock and then calls SessionManager.get_result() to acquire the same lock again when the task name maps to a session. An authenticated caller who knows or creates a mapped task name can therefore block the request indefinitely, and in the default single-process server configuration the blocked event-loop thread prevents other HTTP, WebSocket, and dependent background interactions. Unknown task names do not reach the nested call and are not affected. This issue is fixed in version 3.0.9.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00692 53rd percentileScored 2026-11-07
Fix Fixed UFO (microsoft): 3.0.9

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftUFObefore 3.0.93.0.9Patch availableCNA
  • UFO VendorMicrosoft Affected before 3.0.9 Fixed in 3.0.9 Patch available CNA

Remediation

Update Microsoft UFO to version 3.0.9, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA UFO (microsoft) Fixed in 3.0.9

Timeline

  1. 2026-10-06 Threatist record created from CVE-2026-105792
  2. 2026-10-06 CISA SSVC decision points changed

References

Other 3

  • TI-2026-42212 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-37256 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-26194 Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-16982 Microsoft SharePoint Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-36863 Windows Server Update Service (WSUS) Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
  • TI-2025-33671 Microsoft SharePoint Server Remote Code Execution Vulnerability KEVCVSS 3.1CRITICAL 9.8
See all 18045 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences