- CVSS
- HIGH · 7.1v3.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
- Published
- 2026-08-31
- Weakness
- CWE-862
- Source
- nvd.nist.gov/vuln/detail/CVE-2026-79745
Description
MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.32, the built-in prompt and resource controllers perform no role checking. The mutating POST/PUT /api/prompts* and POST/PUT /api/resources* routes are attached to the authenticated router with no admin gate, and the handlers never read req.user. The DAO singletons they write are consulted first — ahead of any connected MCP server — for every session in handleGetPromptRequest / handleReadResourceRequest. A non-admin can therefore create, overwrite, and shadow global prompt templates and resources that all other users are served. The scored impact is the unauthorized integrity violation (creation/tampering/shadowing of globally-served records); stored prompt injection into other users’ LLM sessions is a downstream consequence of that tampering. This issue has been patched in version 1.0.32.
References
- https://github.com/samanhappy/mcphub/commit/6ba55ac63954a71506e61c088753251e2ff643cf
- https://github.com/samanhappy/mcphub/pull/1069
- https://github.com/samanhappy/mcphub/releases/tag/v1.0.32
- https://github.com/samanhappy/mcphub/security/advisories/GHSA-6cvf-cfch-4g7m
- https://github.com/samanhappy/mcphub/security/advisories/GHSA-6cvf-cfch-4g7m
How GTK Cyber trains on this
AI security training at GTK Cyber covers the LLM and ML-pipeline vulnerability classes that vulnerabilities like CVE-2026-79745 fall into. Our hands-on courses are taught by Charles Givre and other practitioners who break and defend production AI systems.