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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
ondata ckan-mcp-server
@aborruso/ckan-mcp-serveraffected
References
- https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556 ↗
- https://github.com/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40 ↗
- https://github.com/advisories/GHSA-3xm7-qw7j-qc8v ↗
- https://github.com/advisories/GHSA-g84h-j7jj-x32p ↗
- https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.108 ↗