CVE-2026-79747 Server-side request forgery in mcphub
Authenticated non-admin users can exploit Server-Side Request Forgery in MCPHub to access internal resources and read responses via OpenAPI proxy.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79747?
CVE-2026-79747 is a high-severity server-side request forgery vulnerability in samanhappy mcphub, published on 31 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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, an authenticated non-admin user can register a server pointing at an arbitrary URL and make the hub issue server-side requests to it, with no egress filtering (no block of loopback / RFC1918 / link-local 169.254.0.0/16). Via the OpenAPI proxy path the response body is returned to the caller (full, reflected SSRF); via the SSE/streamable-http transport the request is sent blind. This issue has been patched in version 1.0.32.
Weakness: CWE-918
Which versions are affected by CVE-2026-79747?
How do I fix CVE-2026-79747?
No fix has been published for CVE-2026-79747 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-79747 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79747 exists.
Sources
Also known as GHSA-9wx9-prgc-gmjr.