Vulnerability 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 Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/microsoft/UFO/commit/cc653bde75337ab60c320e6b7cb61b86ba6ca948
- https://github.com/microsoft/UFO/releases/tag/3.0.7
- https://github.com/microsoft/UFO/security/advisories/GHSA-hxjv-fmjf-wmjf
- https://github.com/microsoft/UFO/security/advisories/GHSA-hxjv-fmjf-wmjf
FAQ
What is CVE-2026-55440?
CVE-2026-55440 is a vulnerability with a CVSS score of 6.5 (MEDIUM). 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...
How severe is CVE-2026-55440?
CVE-2026-55440 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-55440?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.