fastmcp — security advisory

{
  "id": "018cb1735f963fc391dcf1fb07f7f983e385fcac50c37816665811f34138b700",
  "url": "https://osv.dev/vulnerability/ECHO-51de-88c9-bf42",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ECHO-51de-88c9-bf42",
    "summary": "ECHO-51de-88c9-bf42",
    "evidence": "osv:ECHO-51de-88c9-bf42",
    "products": [
      {
        "name": {
          "value": "fastmcp",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.4.10",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "ECHO-51de-88c9-bf42",
      "aliases": [
        "ECHO-51de-88c9-bf42"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "3.4.10"
                }
              ]
            }
          ],
          "package": {
            "name": "fastmcp",
            "purl": "pkg:pypi/fastmcp",
            "ecosystem": "Echo:PyPI"
          },
          "database_specific": {
            "source": "https://advisory.echohq.com/osv/ECHO-51de-88c9-bf42.json"
          }
        }
      ],
      "modified": "2026-10-25T00:45:05.048536999Z",
      "provider": "osv",
      "upstream": [
        "GHSA-7xgj-8392-5q4r"
      ],
      "references": [
        "https://advisory.echohq.com/cve/GHSA-7xgj-8392-5q4r",
        "https://github.com/advisories/GHSA-7xgj-8392-5q4r"
      ]
    },
    "related_cves": [],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 444236,
  "published_at": "2026-10-25T00:01:05.099+00:00"
}