{"id":"CVE-2026-46538","state":"PUBLISHED","title":"Microsoft UFO accepts cross-device TASK_END messages by session_id only, allowing peer task-result injection","description":"Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO's constellation client tracks pending task responses by session_id only and does not verify that a TASK_END message came from the device that originally received the task. When the constellation sends a task to a target device, it records a pending Future under a session key. The pending task record stores the expected device ID, but the completion path ignores that binding. If another authenticated peer device sends a forged TASK_END with the same session_id, the constellation accepts the response and completes the victim device's pending Future with attacker-controlled result data. This is an authenticated cross-device task-result injection issue.","publishedAt":"2026-05-27T21:56:55.361Z","updatedAt":"2026-05-28T12:38:02.790Z","severity":{"score":5.9,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["microsoft UFO"],"affected":[{"vendor":"microsoft","product":"UFO","versions":[{"version":"3.0.1-4-ge2626659","status":"affected"}]}],"references":["https://github.com/microsoft/UFO/security/advisories/GHSA-wmq2-74rj-7pjc"],"weaknesses":["CWE-294","CWE-345"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46538.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46538","state":"PUBLISHED","datePublished":"2026-05-27T21:56:55.361Z","dateUpdated":"2026-05-28T12:38:02.790Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-14T20:42:31.368Z"},"containers":{"cna":{"title":"Microsoft UFO accepts cross-device TASK_END messages by session_id only, allowing peer task-result injection","descriptions":[{"lang":"en","value":"Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO's constellation client tracks pending task responses by session_id only and does not verify that a TASK_END message came from the device that originally received the task. When the constellation sends a task to a target device, it records a pending Future under a session key. The pending task record stores the expected device ID, but the completion path ignores that binding. If another authenticated peer device sends a forged TASK_END with the same session_id, the constellation accepts the response and completes the victim device's pending Future with attacker-controlled result data. This is an authenticated cross-device task-result injection issue."}],"affected":[{"vendor":"microsoft","product":"UFO","versions":[{"version":"3.0.1-4-ge2626659","status":"affected"}]}],"references":[{"url":"https://github.com/microsoft/UFO/security/advisories/GHSA-wmq2-74rj-7pjc","name":"https://github.com/microsoft/UFO/security/advisories/GHSA-wmq2-74rj-7pjc","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.9,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-294","lang":"en","description":"CWE-294: Authentication Bypass by Capture-replay","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-345","lang":"en","description":"CWE-345: Insufficient Verification of Data Authenticity","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-27T21:56:55.361Z"},"source":{"advisory":"GHSA-wmq2-74rj-7pjc","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/microsoft/UFO/security/advisories/GHSA-wmq2-74rj-7pjc","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-28T12:37:58.013066Z","id":"CVE-2026-46538","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-28T12:38:02.790Z"}}]}}}