CVE-2026-79745
MCPHub: Missing Authorization on Built-in Prompt & Resource CRUD (Unauthorized Tampering of Globally-Served Templates/Resources)
- Published
- Updated
- Reserved
- Assigned by
- GitHub_M
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| GitHub_MCNA (assigner) | 3.1 | High7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
| NVDNVD · Awaiting Analysis | 3.1 | High7.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L |
- EPSS (exploitation in 30 days)
- 0.44% · top 62% of all CVEs (5 Nov 2026)
- CISA SSVC
- Exploitation: poc · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Weakness
Affected products
- affected < 1.0.32
References (4)
- https://github.com/samanhappy/mcphub/security/advisories/GHSA-6cvf-cfch-4g7m (opens in a new tab)x_refsource_CONFIRMexploit
- https://github.com/samanhappy/mcphub/pull/1069 (opens in a new tab)x_refsource_MISC
- https://github.com/samanhappy/mcphub/commit/6ba55ac63954a71506e61c088753251e2ff643cf (opens in a new tab)x_refsource_MISC
- https://github.com/samanhappy/mcphub/releases/tag/v1.0.32 (opens in a new tab)x_refsource_MISC
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2026-79745)Record last updated .