DeepTutor < 1.4.10 - Insecure Default Grants Unrestricted MCP Tool Access to Non-Admin Users

{
  "id": "9921eb68a2f080439baca09a2224e19531f07e6fa1eb9a93745003af3ec1d51a",
  "url": "https://osv.dev/vulnerability/CVE-2026-58168",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DeepTutor < 1.4.10 - Insecure Default Grants Unrestricted MCP Tool Access to Non-Admin Users",
    "summary": "DeepTutor before version 1.4.10 contains an authorization bypass vulnerability that allows low-privilege users to invoke unrestricted MCP tools due to the allowed_mcp_tools function returning None instead of a denied result when mcp_tools is omitted from a user's grant in deeptutor/multi_user/tool_access.py. Attackers or prompt-injected content acting within a user session can enumerate and invoke any configured MCP tool, including filesystem, shell, and browser servers, gaining unauthorized access to sensitive deployment resources.",
    "evidence": "osv:CVE-2026-58168",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-58168",
      "aliases": [
        "CVE-2026-58168",
        "GHSA-jg88-rvpc-qvxj",
        "PYSEC-2026-4206"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/hkuds/deeptutor",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "59f499b2c3c80edede0d4e853382dad745b96c67"
                },
                {
                  "fixed": "90046374b3dcd4f8a866d2d64a64440bc08eb2ef"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.4.10"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StandardRange"
                  },
                  {
                    "range": [
                      {
                        "fixed": "59f499b2c3c80edede0d4e853382dad745b96c67"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v1.4.10"
                  },
                  {
                    "range": [
                      {
                        "fixed": "90046374b3dcd4f8a866d2d64a64440bc08eb2ef"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.3.8",
            "v1.4.6",
            "v1.4.9",
            "v1.4.8",
            "v1.4.7",
            "v1.4.5",
            "v1.4.4",
            "v1.4.3",
            "v1.4.2",
            "v1.4.1",
            "v1.4.0",
            "v1.4.0-beta",
            "v1.3.10",
            "v1.3.9",
            "v1.1.0",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0-beta.4",
            "v1.0.0-beta.3",
            "v1.0.0-beta.2",
            "v1.0.0-beta.1",
            "v0.6.0",
            "v0.5.2",
            "v0.5.1",
            "v0.4.1",
            "v0.4.0",
            "v0.3.0",
            "v0.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-58168.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:36.916723924Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58168.json",
        "https://github.com/HKUDS/DeepTutor/releases/tag/v1.4.10",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-58168",
        "https://www.vulncheck.com/advisories/deeptutor-insecure-default-grants-unrestricted-mcp-tool-access-to-non-admin-users",
        "https://github.com/HKUDS/DeepTutor/pull/579",
        "https://github.com/HKUDS/DeepTutor/commit/90046374b3dcd4f8a866d2d64a64440bc08eb2ef",
        "https://github.com/HKUDS/DeepTutor"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-862"
        ],
        "cna_assigner": "VulnCheck",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/58xxx/CVE-2026-58168.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-58168",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504374,
  "published_at": "2026-06-30T15:52:22.032+00:00"
}