{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.15.2"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0a38565c9d1f790045636bd9d55f8d2296c938c7"
            },
            {
              "fixed": "b9b6e2305e70823c9706291de4b19c4dc3ae05f6"
            }
          ],
          "repo": "https://github.com/labring/fastgpt",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-6jwp-qf29-hpj9"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84301.json"
  },
  "details": "FastGPT is an open-source LLM platform for building AI applications on a knowledge base. Prior to 4.15.2, the safe Axios request interceptor in packages/service/common/api/axios.ts validates a hostname with isInternalAddress() before a later HTTP connection performs an independent DNS lookup, creating a DNS rebinding window, allowing an attacker-controlled hostname to resolve publicly during the check and to a loopback, private, link-local, or metadata address during connection. An authenticated attacker who can supply a URL to a safe-Axios-backed HTTP tool, workflow HTTP node, external file fetch, or other server-side integration can use this time-of-check/time-of-use gap to reach services that direct private-address inputs would block. The same independent re-resolution occurs after manual redirect hops because each redirect target is checked before a separate connection lookup. This issue is fixed in version 4.15.2.",
  "id": "CVE-2026-84301",
  "modified": "2026-09-27T03:30:40.331390023Z",
  "published": "2026-09-22T16:50:19.790Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/labring/FastGPT/releases/tag/v4.15.2"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84301.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/labring/FastGPT/security/advisories/GHSA-6jwp-qf29-hpj9"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-84301"
    },
    {
      "type": "FIX",
      "url": "https://github.com/labring/FastGPT/commit/0a38565c9d1f790045636bd9d55f8d2296c938c7"
    },
    {
      "type": "FIX",
      "url": "https://github.com/labring/FastGPT/pull/7261"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "FastGPT safe axios SSRF guard still allows DNS rebinding TOCTOU on protected outbound requests"
}