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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.

PUBLISHED Reserved 2026-06-29 | Published 2026-06-30 | Updated 2026-07-14 | Assigner VulnCheck




HIGH: 8.8CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

HIGH: 7.7CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

Missing Authorization

Product status

Default status
unaffected

Any version before 1.4.10
affected

Credits

Chia Min Jun Lennon finder

References

github.com/HKUDS/DeepTutor/pull/579 exploit

github.com/HKUDS/DeepTutor/releases/tag/v1.4.10 (Release Notes) release-notes

github.com/HKUDS/DeepTutor/pull/579 (Fix PR) issue-tracking

github.com/...ommit/90046374b3dcd4f8a866d2d64a64440bc08eb2ef (Fix Commit) patch

www.vulncheck.com/...cted-mcp-tool-access-to-non-admin-users third-party-advisory

cve.org (CVE-2026-58168)

nvd.nist.gov (CVE-2026-58168)

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