SSRF Vulnerability in MCPHub Affects Multiple MCP Servers
CVE-2026-79749

7.6HIGH

Key Information:

Vendor

Samanhappy

Status
Mcphub
Vendor
CVE Published:
31 August 2026

What is CVE-2026-79749?

MCPHub's SSRF guard prior to version 1.0.32 is susceptible to bypass attacks due to an inadequate validation of IPv6 address formats. Specifically, the guard only checks for certain local IPv6 addresses but fails to consider IPv6 transition address families like NAT64, 6to4, and Teredo. This oversight allows attackers to exploit vulnerabilities by encoding a private IPv4 address in these unsupported IPv6 formats, enabling unauthorized access to internal resources. The issue has been resolved in version 1.0.32.

Affected Version(s)

mcphub < 1.0.32

References

https://github.com/samanhappy/mcphub/security/advisories/...
x_refsource_CONFIRM
https://github.com/samanhappy/mcphub/pull/1069
x_refsource_MISC
https://github.com/samanhappy/mcphub/commit/2b10ae36112ce...
x_refsource_MISC

CVSS V4

Score:
7.6
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
Physical
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.