{"id":"CVE-2026-92360","summary":"ag-ui-protocol ag-ui Event Application Layer agent.ts prepareRunAgentInput origin validation","details":"A weakness has been identified in ag-ui-protocol ag-ui 1.0. The impacted element is the function prepareRunAgentInput of the file agent/agent.ts of the component Event Application Layer. This manipulation of the argument TEXT_MESSAGE_START causes origin validation error. Remote exploitation of the attack is possible. The pull request to fix this issue awaits acceptance.","modified":"2026-09-18T03:48:41.681373700Z","published":"2026-09-16T12:30:09.510Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92360.json","cna_assigner":"VulDB","cwe_ids":["CWE-345","CWE-346"]},"references":[{"type":"WEB","url":"https://github.com/ag-ui-protocol/ag-ui/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92360.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92360"},{"type":"ADVISORY","url":"https://vuldb.com/cve/CVE-2026-92360"},{"type":"ADVISORY","url":"https://vuldb.com/submit/934950"},{"type":"ADVISORY","url":"https://vuldb.com/vuln/405446"},{"type":"REPORT","url":"https://github.com/ag-ui-protocol/ag-ui/issues/2437"},{"type":"REPORT","url":"https://vuldb.com/vuln/405446/cti"},{"type":"FIX","url":"https://github.com/ag-ui-protocol/ag-ui/pull/2701"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ag-ui-protocol/ag-ui","events":[{"introduced":"fd34acb6be63a67ed9dbbc7f2f59f7c6f8c01247"},{"last_affected":"fd34acb6be63a67ed9dbbc7f2f59f7c6f8c01247"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"1.0"},{"last_affected":"1.0"}]}}],"versions":["1.0","@ag-ui/mastra@1.0.3","@ag-ui/langgraph@0.0.33","@ag-ui/langchain@0.0.2","@ag-ui/claude-agent-sdk@0.0.3"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92360.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X"}]}