PYSEC-2026-4206
DeepTutor missing MCP tool authorization allows non-admin users to invoke unrestricted tools
Quick fix
PYSEC-2026-4206 — deeptutor: upgrade to the fixed version with the command below.
pip install --upgrade 'deeptutor>=1.4.10'Details
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.
Are you affected?
Enter the version of the package you're using.
Affected packages
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-58168[ADVISORY]
- https://github.com/HKUDS/DeepTutor/pull/579[WEB]
- https://github.com/HKUDS/DeepTutor/commit/90046374b3dcd4f8a866d2d64a64440bc08eb2ef[WEB]
- https://github.com/HKUDS/DeepTutor[PACKAGE]
- https://github.com/HKUDS/DeepTutor/releases/tag/v1.4.10[WEB]
- https://www.vulncheck.com/advisories/deeptutor-insecure-default-grants-unrestricted-mcp-tool-access-to-non-admin-users[WEB]
- https://pypi.org/project/deeptutor[PACKAGE]
- https://github.com/advisories/GHSA-jg88-rvpc-qvxj[ADVISORY]