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GO-2026-5607
MCP Registry has an unauthenticated SSRF: HTTP namespace verification dials 6to4 / NAT64 / site-local IPv6 addresses, bypassing private-address allowlist in github.com/modelcontextprotocol/registry
Quick fix
GO-2026-5607 — github.com/modelcontextprotocol/registry: upgrade to the fixed version with the command below.
go get github.com/modelcontextprotocol/registry@v1.7.7Details
MCP Registry has an unauthenticated SSRF: HTTP namespace verification dials 6to4 / NAT64 / site-local IPv6 addresses, bypassing private-address allowlist in github.com/modelcontextprotocol/registry
Are you affected?
Enter the version of the package you're using.
Affected packages
Go/github.com/modelcontextprotocol/registry
Introduced in:
0Fixed in: 1.7.7Fix
go get github.com/modelcontextprotocol/registry@v1.7.7References
- https://github.com/modelcontextprotocol/registry/security/advisories/GHSA-r48c-v28r-pf6v[ADVISORY]
- https://nvd.nist.gov/vuln/detail/CVE-2026-44430[ADVISORY]
- https://github.com/modelcontextprotocol/registry/commit/f5f40bd98084466eaf18fe48ea62a0d534caa774[FIX]
- https://github.com/modelcontextprotocol/registry/pull/1250[FIX]
- https://github.com/modelcontextprotocol/registry/releases/tag/v1.7.7[WEB]