{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "= 4.15.0-beta4"
              },
              {
                "last_affected": "= 4.15.0-beta4"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "8784b62215721c87e7bd2f35d45a4e29e07d38f5"
            },
            {
              "fixed": "f5f1e58b25571b7107ca49d9bf96bb2b0e0a620a"
            },
            {
              "fixed": "0c1840c7773c5be5d777f86228651479e02155db"
            }
          ],
          "repo": "https://github.com/labring/fastgpt",
          "type": "GIT"
        }
      ],
      "versions": [
        "= 4.15.0-beta4"
      ]
    }
  ],
  "aliases": [
    "GHSA-w732-rq8c-chc8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-798"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61684.json"
  },
  "details": "FastGPT is a knowledge-based AI application platform. In 4.15.0-beta4, FastGPT plugin invoke reverse-call endpoints under /api/invoke/* authenticate only by verifying a JWT signed with INVOKE_TOKEN_SECRET, which defaults to the constant string token and was not set in official deployment templates. An unauthenticated attacker can self-sign an HS256 JWT and reach /api/invoke/userInfo to disclose cross-tenant user PII by attacker-supplied tmbId values, or /api/invoke/fileUpload to write attacker-controlled content into chat files. This issue is fixed in version 4.15.0-beta5.",
  "id": "CVE-2026-61684",
  "modified": "2026-07-17T03:42:06.451875512Z",
  "published": "2026-07-15T14:28:22.480Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/labring/FastGPT/releases/tag/v4.15.0-beta5"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/61xxx/CVE-2026-61684.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/labring/FastGPT/security/advisories/GHSA-w732-rq8c-chc8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-61684"
    },
    {
      "type": "FIX",
      "url": "https://github.com/labring/FastGPT/commit/f5f1e58b25571b7107ca49d9bf96bb2b0e0a620a"
    },
    {
      "type": "FIX",
      "url": "https://github.com/labring/FastGPT/pull/7170"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "FastGPT: Unauthenticated cross-tenant data access via forgeable plugin-invoke JWT (default INVOKE_TOKEN_SECRET='token')"
}