ag-ui-protocol ag-ui CORSMiddleware utils.py create_strands_app cross-domain policy

{
  "id": "aab0fe3e48a919147ca6cfba1c2ca5166ab92130d27ba79a71f6bd8fba16996d",
  "url": "https://osv.dev/vulnerability/CVE-2026-92359",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ag-ui-protocol ag-ui CORSMiddleware utils.py create_strands_app cross-domain policy",
    "summary": "A security flaw has been discovered in ag-ui-protocol ag-ui 0.3.0. The affected element is the function create_strands_app of the file integrations/aws-strands/python/src/ag_ui_strands/utils.py of the component CORSMiddleware. The manipulation results in permissive cross-domain policy with untrusted domains. The attack may be launched remotely. The attack requires a high level of complexity. The exploitability is described as difficult. Upgrading to version AGUI.Abstractions@0.0.6 is sufficient to fix this issue. The patch is identified as 9b143b9668fa52c2054ede9d34a45ac4b4401089. It is suggested to upgrade the affected component.",
    "evidence": "osv:CVE-2026-92359",
    "products": [],
    "severity": "low",
    "structured": {
      "id": "CVE-2026-92359",
      "aliases": [
        "CVE-2026-92359"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ag-ui-protocol/ag-ui",
              "type": "GIT",
              "events": [
                {
                  "introduced": "5dc6e444599117c14a0ae510507cc0dc94618635"
                },
                {
                  "fixed": "9b143b9668fa52c2054ede9d34a45ac4b4401089"
                },
                {
                  "fixed": "9f393021ecbd6bcc62dc4b1ad5a6ac4b797565f4"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0.3.0"
                      },
                      {
                        "last_affected": "0.3.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandaloneSingleVersion"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9b143b9668fa52c2054ede9d34a45ac4b4401089"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "9f393021ecbd6bcc62dc4b1ad5a6ac4b797565f4"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "AGUI.Abstractions@0.0.6"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.3.0",
            "release/2026-08-20",
            "@ag-ui/llamaindex@0.2.0",
            "@ag-ui/crewai@0.0.4",
            "@ag-ui/agno@0.0.6",
            "release/2026-08-18",
            "@ag-ui/ag2@0.0.2",
            "release/2026-08-17",
            "@ag-ui/pydantic-ai@0.0.3",
            "ag-ui-langgraph@0.0.43",
            "@ag-ui/mastra@1.1.2",
            "@ag-ui/langgraph@0.0.43",
            "release/2026-08-16",
            "@ag-ui/langchain@0.0.3",
            "release/2026-08-14",
            "ag_ui_strands@0.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-92359.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:49.833824098Z",
      "provider": "osv",
      "references": [
        "https://github.com/ag-ui-protocol/ag-ui/",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92359.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-92359",
        "https://vuldb.com/cve/CVE-2026-92359",
        "https://vuldb.com/submit/934120",
        "https://vuldb.com/vuln/405445",
        "https://github.com/ag-ui-protocol/ag-ui/issues/2433",
        "https://vuldb.com/vuln/405445/cti",
        "https://github.com/ag-ui-protocol/ag-ui/commit/9b143b9668fa52c2054ede9d34a45ac4b4401089",
        "https://github.com/ag-ui-protocol/ag-ui/pull/2492",
        "https://github.com/ag-ui-protocol/ag-ui/releases/tag/AGUI.Abstractions%400.0.6"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-346",
          "CWE-942"
        ],
        "cna_assigner": "VulDB",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/92xxx/CVE-2026-92359.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-92359",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 518452,
  "published_at": "2026-09-16T12:00:16.22+00:00"
}