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MCP Registry has an unauthenticated SSRF: HTTP namespace verification dials 6to4 / NAT64 / site-local IPv6 addresses, bypassing private-address allowlist
MCP Registry has an unauthenticated SSRF: HTTP namespace verification dials 6to4 / NAT64 / site-local IPv6 addresses, bypassing private-address allowlist
Affected packages
- github.com/modelcontextprotocol/registry
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/modelcontextprotocol/registry/security/advisories/GHSA-r48c-v28r-pf6v
- https://nvd.nist.gov/vuln/detail/CVE-2026-44430
- https://github.com/modelcontextprotocol/registry/pull/1250
- https://github.com/modelcontextprotocol/registry/commit/f5f40bd98084466eaf18fe48ea62a0d534caa774
- https://github.com/modelcontextprotocol/registry
- https://github.com/modelcontextprotocol/registry/releases/tag/v1.7.7
Structured record: https://osv.dev/vulnerability/GHSA-r48c-v28r-pf6v
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