FKIE_CVE-2026-55440

Vulnerability from fkie_nvd - Published: 2026-07-16 16:19 - Updated: 2026-07-16 17:46
Severity
6.5 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
security-advisories@github.comhttps://github.com/microsoft/UFO/commit/cc653bde75337ab60c320e6b7cb61b86ba6ca948
security-advisories@github.comhttps://github.com/microsoft/UFO/releases/tag/3.0.7
security-advisories@github.comhttps://github.com/microsoft/UFO/security/advisories/GHSA-hxjv-fmjf-wmjf
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/microsoft/UFO/security/advisories/GHSA-hxjv-fmjf-wmjf
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "UFO",
          "vendor": "microsoft",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 3.0.7"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "id": "CVE-2026-55440",
  "lastModified": "2026-07-16T17:46:04.350",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.8,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-55440",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-16T16:23:07.186935Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-16T16:19:13.787",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/UFO/commit/cc653bde75337ab60c320e6b7cb61b86ba6ca948"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/UFO/releases/tag/3.0.7"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/microsoft/UFO/security/advisories/GHSA-hxjv-fmjf-wmjf"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/microsoft/UFO/security/advisories/GHSA-hxjv-fmjf-wmjf"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-862"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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