MaxKB: UpdateStoreTool fetches caller-supplied app-store URLs without host validation

{
  "id": "3b6a30e4e83713f582e4193e9de188bca1a4c991468b6bcfde9f3e84f628ed3b",
  "url": "https://osv.dev/vulnerability/CVE-2026-64870",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "MaxKB: UpdateStoreTool fetches caller-supplied app-store URLs without host validation",
    "summary": "MaxKB is an open-source AI assistant for enterprise. In versions 2.0.0 through 2.10.4-lts, UpdateStoreTool.update_tool passes caller-supplied download_url and download_callback_url values to requests.get without equivalent trusted-host and redirect validation, allowing an authenticated workspace user to make the server request internal, loopback, link-local, or cloud metadata URLs. A fix is present on the v2 branch but has not yet been included in a published release.",
    "evidence": "osv:CVE-2026-64870",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-64870",
      "aliases": [
        "CVE-2026-64870",
        "GHSA-7xxm-gqxv-ph3v"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/1panel-dev/maxkb",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c96de7a5f536909aef37fae92f97f62798eb1373"
                },
                {
                  "fixed": "a96a4fc17051d80e5b90a632ad8ec851d7d24b58"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "2.0.0"
                      },
                      {
                        "last_affected": "2.10.4-lts"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "a96a4fc17051d80e5b90a632ad8ec851d7d24b58"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v2.10.3-lts",
            "v2.10.1-lts",
            "v2.10.0-lts",
            "v2.9.2",
            "v2.9.1",
            "v2.9.0",
            "v2.8.1",
            "v2.8.0",
            "v2.7.0",
            "v2.6.1",
            "v2.6.0",
            "v2.5.0",
            "v2.4.0",
            "v2.3.0",
            "v2.2.0",
            "v2.1.0",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64870.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:33.795635754Z",
      "provider": "osv",
      "references": [
        "https://github.com/1Panel-dev/MaxKB/security/advisories/GHSA-7xxm-gqxv-ph3v",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64870.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-64870",
        "https://github.com/1Panel-dev/MaxKB/commit/a96a4fc17051d80e5b90a632ad8ec851d7d24b58"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-918"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64870.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-64870",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 501112,
  "published_at": "2026-07-30T17:01:18.102+00:00"
}