{"schema_version":"1.3.1","id":"GO-2026-5607","modified":"2026-06-25T22:34:34Z","published":"2026-06-25T22:34:34Z","aliases":["CVE-2026-44430","GHSA-r48c-v28r-pf6v"],"summary":"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","details":"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","affected":[{"package":{"name":"github.com/modelcontextprotocol/registry","ecosystem":"Go"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.7.7"}]}],"ecosystem_specific":{}}],"references":[{"type":"ADVISORY","url":"https://github.com/modelcontextprotocol/registry/security/advisories/GHSA-r48c-v28r-pf6v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44430"},{"type":"FIX","url":"https://github.com/modelcontextprotocol/registry/commit/f5f40bd98084466eaf18fe48ea62a0d534caa774"},{"type":"FIX","url":"https://github.com/modelcontextprotocol/registry/pull/1250"},{"type":"WEB","url":"https://github.com/modelcontextprotocol/registry/releases/tag/v1.7.7"}],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-5607","review_status":"UNREVIEWED"}}