# CVE-2026-79747: MCPHub SSRF in server registration

Source: https://junglewise.ai/threats/cve-2026-79747-mcphub-ssrf-in-server-registration  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-31. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-79747 · Severity: high · CVSS 7.1 · Published 2026-08-31

MCPHub is a middleware platform that manages and routes requests to multiple API servers. An authenticated user without admin privileges can register a malicious server pointing to any internal URL, forcing MCPHub to make HTTP requests to those targets. The responses are returned directly to the attacker, allowing them to read internal service responses (including cloud metadata, admin APIs, or other loopback services) and perform blind HTTP requests to internal systems.

Technologies: [Samanhappy Mcphub](https://junglewise.ai/threats/technologies/mcphub). Vendors: [Samanhappy](https://junglewise.ai/threats/vendors/samanhappy).

## Quick answers

**Is CVE-2026-79747 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-79747 being exploited in the wild.

**How severe is CVE-2026-79747?** High severity, with a CVSS score of 7.1, published 31 August 2026.

**Which products and versions are affected?** Samanhappy Mcphub <1.0.32.

**Is there a fix for CVE-2026-79747?** A patch was published on 2026-08-23: Version 1.0.32 released with SSRF egress controls Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-79747 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-79747?** Check whether you run Samanhappy Mcphub at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a Server-Side Request Forgery (SSRF) in MCPHub's server registration endpoint (POST /servers). Non-admin authenticated users can register OpenAPI or URL-based servers without egress filtering or destination validation. Two exploitation paths exist: (1) reflected SSRF via the OpenAPI proxy, where OpenAPIClient.callTool() requests a user-supplied URL and returns the response body to the caller, and (2) blind SSRF via transport creation, where SSEClientTransport or StreamableHTTPClientTransport connect to arbitrary URLs. The vulnerability allows access to RFC1918 addresses, loopback interfaces (127.0.0.1), and link-local addresses (169.254.0.0/16), potentially exposing cloud instance metadata services (IMDS) and internal admin APIs. The fix in version 1.0.32 adds egress controls to block these address ranges and enforces validation on all user-supplied URLs before connection.

## Affected products

- samanhappy MCPHub <1.0.32

## Timeline

- 2026-08-23: disclosed
- 2026-08-23: patched: Version 1.0.32 released with SSRF egress controls

## References

- [https://github.com/samanhappy/mcphub/releases/tag/v1.0.32](https://github.com/samanhappy/mcphub/releases/tag/v1.0.32)
- [https://github.com/samanhappy/mcphub/security/advisories/GHSA-9wx9-prgc-gmjr](https://github.com/samanhappy/mcphub/security/advisories/GHSA-9wx9-prgc-gmjr)

## Related threats

- [samanhappy MCPHub credential exfiltration via passthroughHeaders](https://junglewise.ai/threats/cve-2026-120323-a-security-flaw-has-been-discovered-in-samanhappy-mcphub-up-to-1)
- [samanhappy MCPHub privilege management in template import](https://junglewise.ai/threats/cve-2026-94047-a-security-vulnerability-has-been-detected-in-samanhappy-mcphub)
- [MCPHub OAuth 2.0 authentication bypass in authorization server](https://junglewise.ai/threats/cve-2026-90474-mcphub-oauth-2-0-authentication-bypass-in-authorization-server)
- [MCPHub horizontal privilege escalation in tool execution API](https://junglewise.ai/threats/cve-2026-79750-mcphub-horizontal-privilege-escalation-in-tool-execution-api)
- [MCPHub SSRF guard bypass in IPv6 transition address handling](https://junglewise.ai/threats/cve-2026-79749-mcphub-ssrf-guard-bypass-in-ipv6-transition-address-handling)