{"id":"CVE-2026-79749","title":"MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies","summary":"MCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.32, MCPHub's SSRF guard in src/utils/ssrf.ts uses a cus…","severity":"none","cwe":["CWE-918"],"published":"2026-08-31","updated":"2026-09-08","sourceUpdated":"2026-09-08T21:08:37.320","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-79749","references":[{"url":"https://github.com/samanhappy/mcphub/commit/2b10ae36112ce68deebf910b22505d44efcef552","label":"security-advisories@github.com"},{"url":"https://github.com/samanhappy/mcphub/pull/1069","label":"security-advisories@github.com"},{"url":"https://github.com/samanhappy/mcphub/releases/tag/v1.0.32","label":"security-advisories@github.com"},{"url":"https://github.com/samanhappy/mcphub/security/advisories/GHSA-pr4x-3pc7-2fhw","label":"security-advisories@github.com"},{"url":"https://github.com/samanhappy/mcphub/security/advisories/GHSA-pr4x-3pc7-2fhw","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00258,"epssPercentile":0.17805,"ingestedAt":"2026-09-08T21:11:12.288Z","slug":"CVE-2026-79749","body":"## Overview\n\nMCPHub is a unified hub for centrally managing and dynamically orchestrating multiple MCP servers/APIs into separate endpoints with flexible routing strategies. Prior to version 1.0.32, MCPHub's SSRF guard in src/utils/ssrf.ts uses a custom isBlockedIpv6 function that only checks for loopback, link-local, unique-local, IPv4-mapped, and IPv4-compatible IPv6 addresses. IPv6 transition address families -- NAT64 (64:ff9b::/96), 6to4 (2002::/16), and Teredo (2001::/32) -- are not checked. An attacker who can specify a URL for an MCP server connection can encode a private IPv4 address inside one of these IPv6 forms to bypass the SSRF guard and reach internal infrastructure. This issue has been patched in version 1.0.32.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}