Uni-CLI: Legacy HTTP MCP transport accepted browser-originated localhost requests

{
  "id": "5580b8dd3a564db01e6df0cb5b1eba68f3c22607ac01fa63ba2853a0210cd572",
  "url": "https://osv.dev/vulnerability/CVE-2026-58497",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Uni-CLI: Legacy HTTP MCP transport accepted browser-originated localhost requests",
    "summary": "Uni-CLI gives people and agents one command interface for websites, browsers, desktop applications, local tools, and MCP. Prior to version 0.225.2, Uni-CLI exposed the legacy JSON-RPC-over-HTTP MCP transport on loopback without validating browser Origin headers before routing requests. A malicious web page could send a CORS simple POST request, such as text/plain, to the local /mcp endpoint and deliver a JSON-RPC body to the dispatcher. If the user had started the local MCP HTTP transport, that page could drive tools/call requests against the user's local Uni-CLI server. The Streamable HTTP transport already enforced this browser-to-localhost boundary. The legacy stateless HTTP path did not, so the two HTTP transports had drifted. This issue is about the browser-to-localhost boundary; it does not change Uni-CLI's local-code-execution trust model. This issue has been patched in version 0.225.2.",
    "evidence": "osv:CVE-2026-58497",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-58497",
      "aliases": [
        "CVE-2026-58497",
        "GHSA-v3f4-w7r7-v3hm"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/olo-dot-io/uni-cli",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "69443940a3d0ec3ee2fc28a2fc782cb2069385e3"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.225.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "69443940a3d0ec3ee2fc28a2fc782cb2069385e3"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v0.225.2"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.225.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.225.1",
            "v0.225.0",
            "v0.224.1",
            "v0.224.0",
            "v0.223.4",
            "v0.223.3",
            "v0.223.2",
            "v0.223.1",
            "v0.223.0",
            "v0.222.3",
            "v0.222.2",
            "v0.222.1",
            "v0.222.0",
            "v0.221.1",
            "v0.221.0",
            "v0.220.1",
            "v0.220.0",
            "v0.219.0",
            "v0.218.1",
            "v0.218.0",
            "v0.217.3",
            "safety/pre-v218-commit-20260504212044",
            "v0.217.0",
            "v0.215.0",
            "v0.213.3",
            "v0.213.1",
            "v0.213.0",
            "v0.213.0-beta.1",
            "v0.212.1",
            "v0.211.2",
            "v0.210.0",
            "v0.209.0",
            "v0.208.0",
            "v0.207.1",
            "v0.207.0",
            "v0.206.0",
            "v0.205.0",
            "v0.204.0",
            "v0.203.0",
            "v0.202.0",
            "v0.201.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58497.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:26.455780791Z",
      "provider": "osv",
      "references": [
        "https://github.com/olo-dot-io/Uni-CLI/releases/tag/v0.225.2",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58497.json",
        "https://github.com/olo-dot-io/Uni-CLI/security/advisories/GHSA-v3f4-w7r7-v3hm",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-58497"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-346",
          "CWE-352"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58497.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-58497",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 493078,
  "published_at": "2026-10-23T14:49:42.619+00:00"
}