Vulnerability · Published Jun 30, 2026 · Assigned by VulnCheck

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

High 8.8

In plain English

A high-severity missing authorization in DeepTutor from HKUDS. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.4%top 64.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
PyPI	deeptutor	1.4.10	GHSA-jg88-rvpc-qvxj
PyPI	deeptutor	1.4.10	PYSEC-2026-4206

Affected products (as reported)

Vendor	Product	Versions
HKUDS	DeepTutor	0 – before 1.4.10

Weakness: CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Release Notes release-notes
Fix PR issue-tracking
Fix Commit patch
https://www.vulncheck.com/advisories/deeptutor-insecure-default-grants-unrestricted-mcp-tool-access-to-non-admin-users third-party-advisory