@modelcontextprotocol registry

• CVE-2026-44428 Low 2.1 MCP Registry: GitHub OIDC tokens replayable across registry deployments due to shared audience 0.2%
• CVE-2026-44427 None 0.0 MCP Registry: Open Redirect 0.5%
• CVE-2026-44429 Medium 5.1 MCP Registry: Stored XSS in catalogue UI via attribute-quote breakout in publisher-controlled `websiteUrl` 0.2%
• CVE-2026-44430 Medium 6.3 MCP Registry: Unauthenticated SSRF: HTTP namespace verification dials 6to4 / NAT64 / site-local IPv6 addresses, bypassing private-address allowlist 0.3%
• CVE-2026-45781 Low 3.5 MCP Registry: OCI ownership validation fails open on upstream rate limits, allowing attacker-controlled package claims 0.2%