SEPTEMBER 9, 2026
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Case File

CVE-2026-55440

MEDIUM · CVSS 6.5 EPSS 0.66% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-16 · Last synced 2026-08-15

CyberRota Analysis

AI-Generated

The Microsoft UFO open-source framework is vulnerable due to improper session management in the COMMAND_RESULTS handler, allowing authenticated clients to create unowned session IDs. This can lead to denial of service for legitimate users or memory exhaustion through the creation of phantom sessions. Organizations using versions prior to 3.0.7 should prioritize upgrading to mitigate these risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-55440
Severity
MEDIUM
CVSS
6.5
EPSS
0.66%
Microsoft

Original NVD 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.