CVE-2026-55440: CWE-400: Uncontrolled Resource Consumption in microsoft UFO
Microsoft UFO open-source framework for intelligent automation across devices and platforms. Prior to 3.0.7, the COMMAND_RESULTS handler in ufo/server/ws/handler.py called get_or_create_session in ufo/server/services/session_manager.py without owner_client_id, allowing an authenticated client to create an unowned attacker-chosen session_id such as constellation_task_id = f"{task_name}@{task_id}" and deny the legitimate owner or exhaust memory with phantom sessions. This issue is fixed in version 3.0.7.
AI Analysis
Technical Summary
CVE-2026-55440 describes an uncontrolled resource consumption vulnerability (CWE-400) in Microsoft UFO versions before 3.0.7. The COMMAND_RESULTS handler in the server's WebSocket handler calls get_or_create_session without specifying an owner_client_id, enabling an authenticated client to create attacker-chosen session IDs that are unowned. This can result in denial of service to legitimate owners or memory exhaustion due to phantom sessions. The vulnerability is resolved in version 3.0.7.
Potential Impact
An authenticated client can create unowned sessions with arbitrary session IDs, potentially denying legitimate users access or exhausting server memory resources. This leads to availability impact (denial of service) without affecting confidentiality or integrity.
Mitigation Recommendations
Upgrade Microsoft UFO to version 3.0.7 or later, where this issue is fixed. Patch status is confirmed by the version fix noted in the description. No additional mitigations are specified.
CVE-2026-55440: CWE-400: Uncontrolled Resource Consumption in microsoft UFO
Description
Microsoft UFO open-source framework for intelligent automation across devices and platforms. Prior to 3.0.7, the COMMAND_RESULTS handler in ufo/server/ws/handler.py called get_or_create_session in ufo/server/services/session_manager.py without owner_client_id, allowing an authenticated client to create an unowned attacker-chosen session_id such as constellation_task_id = f"{task_name}@{task_id}" and deny the legitimate owner or exhaust memory with phantom sessions. This issue is fixed in version 3.0.7.
CVSS v3.1
Score 6.5medium
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-55440 describes an uncontrolled resource consumption vulnerability (CWE-400) in Microsoft UFO versions before 3.0.7. The COMMAND_RESULTS handler in the server's WebSocket handler calls get_or_create_session without specifying an owner_client_id, enabling an authenticated client to create attacker-chosen session IDs that are unowned. This can result in denial of service to legitimate owners or memory exhaustion due to phantom sessions. The vulnerability is resolved in version 3.0.7.
Potential Impact
An authenticated client can create unowned sessions with arbitrary session IDs, potentially denying legitimate users access or exhausting server memory resources. This leads to availability impact (denial of service) without affecting confidentiality or integrity.
Mitigation Recommendations
Upgrade Microsoft UFO to version 3.0.7 or later, where this issue is fixed. Patch status is confirmed by the version fix noted in the description. No additional mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-06-16T21:59:57.017Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a59044668715ace4352aded
Added to database: 07/16/2026, 16:18:14 UTC
Last enriched: 07/16/2026, 16:33:12 UTC
Last updated: 07/17/2026, 02:10:39 UTC
Views: 8
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