CVE-2026-55440

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Source
https://cve.org/CVERecord?id=CVE-2026-55440
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55440.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-55440
Aliases
  • GHSA-hxjv-fmjf-wmjf
Published
2026-07-16T15:35:51Z
Modified
2026-10-28T02:30:56Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
Microsoft UFO: COMMAND_RESULTS handler creates unowned sessions, allowing authenticated session-squatting denial of service
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-400",
        "CWE-862"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55440.json"
}
References

Affected packages

Git / github.com/microsoft/ufo

Affected ranges

Type
GIT
Repo
https://github.com/microsoft/ufo
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
219b8f77eb47b4b7c10145fe49c1dc2f9438c287
Fixed
cc653bde75337ab60c320e6b7cb61b86ba6ca948
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "fixed":  "3.0.7"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StringRangeExpression"
        },
        {
            "range":  [
                {
                    "fixed":  "cc653bde75337ab60c320e6b7cb61b86ba6ca948"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        },
        {
            "original_tag":  "3.0.7",
            "range":  [
                {
                    "fixed":  "219b8f77eb47b4b7c10145fe49c1dc2f9438c287"
                }
            ],
            "source":  "REFERENCES_TAG"
        }
    ]
}

Affected versions

3.*
3.0.6
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.0.4

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55440.json"