@aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509

[ Description ]Official description

CKAN MCP Server is a tool for querying CKAN open data portals. Prior to version 0.4.108, the SSRF guard `validateServerUrl` (added for CVE-2026-33060, extended for CVE-2026-53509) validates only the hostname string and never resolves DNS. Any caller-supplied `server_url` whose hostname *resolves* to an internal address passes the guard, so the server issues requests to loopback and cloud metadata (`169.254.169.254`). This is a third bypass of the same guard, and it reaches IMDS — strictly more than CVE-2026-53509, which only reached loopback. Version 0.4.108 contains an updated fix.

[ Fixes ]Fixes and patches

• @aborruso/ckan-mcp-server 0.4.108Fixed version · GitHub Advisories · npm package @aborruso/ckan-mcp-server: upgrade to 0.4.108 or later (affected <= 0.4.107)

[ Packages ]Affected open-source packages

• @aborruso/ckan-mcp-server npmAffected <= 0.4.107 · fixed in 0.4.108 · GHSA-798p-78g2-v556

[ References ]References

• github.com/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556x_refsource_CONFIRM
• github.com/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40x_refsource_MISC
• github.com/advisories/GHSA-3xm7-qw7j-qc8vx_refsource_MISC
• github.com/advisories/GHSA-g84h-j7jj-x32px_refsource_MISC
• github.com/ondata/ckan-mcp-server/releases/tag/v0.4.108x_refsource_MISC