What’s Vulnerable › Vulnerabilities

CVE-2026-58168: DeepTutor < 1.4.10 - Insecure Default Grants Unrestricted MCP Tool Access to Non-Admin Users

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-30 · updated 2026-10-25
• Weakness: CWE-862

Description

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.

Affected products

• HKUDS DeepTutor: before 1.4.10 — fixed in 1.4.10

How to fix

Upgrade to a fixed version: HKUDS DeepTutor 1.4.10. Check the vendor advisory for mitigations.

References

• https://github.com/HKUDS/DeepTutor/commit/90046374b3dcd4f8a866d2d64a64440bc08eb2ef
• https://github.com/HKUDS/DeepTutor/pull/579
• https://github.com/HKUDS/DeepTutor/releases/tag/v1.4.10
• https://www.vulncheck.com/advisories/deeptutor-insecure-default-grants-unrestricted-mcp-tool-access-to-non-admin-users
• https://github.com/HKUDS/DeepTutor/pull/579

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