{"id":"CVE-2026-46544","state":"PUBLISHED","title":"Microsoft UFO reuses client-supplied WebSocket session IDs and replays stale task results to new authenticated requesters","description":"Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO accepts client-supplied session_id values in WebSocket task messages and reuses an existing in-memory session object if that session_id already exists. If a prior session has completed and remains in memory with populated results, a different authenticated client can send a new TASK message using the same session_id. The server re-enters the existing session object and sends the stale stored result to the new requester through the normal send_task_end() callback path. This is an authenticated cross-client stale result replay issue. The issue requires that the attacker knows or can predict a live or recently completed session_id.","publishedAt":"2026-05-27T21:53:11.257Z","updatedAt":"2026-05-28T13:18:09.622Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","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-29gc-vqjp-7fqf"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46544.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46544","state":"PUBLISHED","datePublished":"2026-05-27T21:53:11.257Z","dateUpdated":"2026-05-28T13:18:09.622Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-05-14T20:42:31.368Z"},"containers":{"cna":{"title":"Microsoft UFO reuses client-supplied WebSocket session IDs and replays stale task results to new authenticated requesters","descriptions":[{"lang":"en","value":"Microsoft UFO open-source framework for intelligent automation across devices and platforms. In 3.0.1-4-ge2626659, Microsoft UFO accepts client-supplied session_id values in WebSocket task messages and reuses an existing in-memory session object if that session_id already exists. If a prior session has completed and remains in memory with populated results, a different authenticated client can send a new TASK message using the same session_id. The server re-enters the existing session object and sends the stale stored result to the new requester through the normal send_task_end() callback path. This is an authenticated cross-client stale result replay issue. The issue requires that the attacker knows or can predict a live or recently completed session_id."}],"affected":[{"vendor":"microsoft","product":"UFO","versions":[{"version":"3.0.1-4-ge2626659","status":"affected"}]}],"references":[{"url":"https://github.com/microsoft/UFO/security/advisories/GHSA-29gc-vqjp-7fqf","name":"https://github.com/microsoft/UFO/security/advisories/GHSA-29gc-vqjp-7fqf","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-05-27T21:53:11.257Z"},"source":{"advisory":"GHSA-29gc-vqjp-7fqf","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/microsoft/UFO/security/advisories/GHSA-29gc-vqjp-7fqf","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-28T13:17:46.401553Z","id":"CVE-2026-46544","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-05-28T13:18:09.622Z"}}]}}}