data/reports/GO-2026-5607.yaml

id: GO-2026-5607
modules:
    - module: github.com/modelcontextprotocol/registry
      versions:
        - fixed: 1.7.7
      vulnerable_at: 1.7.6
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
cves:
    - CVE-2026-44430
ghsas:
    - GHSA-r48c-v28r-pf6v
references:
    - advisory: https://github.com/modelcontextprotocol/registry/security/advisories/GHSA-r48c-v28r-pf6v
    - advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-44430
    - fix: https://github.com/modelcontextprotocol/registry/commit/f5f40bd98084466eaf18fe48ea62a0d534caa774
    - fix: https://github.com/modelcontextprotocol/registry/pull/1250
    - web: https://github.com/modelcontextprotocol/registry/releases/tag/v1.7.7
source:
    id: GHSA-r48c-v28r-pf6v
    created: 2026-06-25T15:46:25.140043292-04:00
review_status: UNREVIEWED