CKAN MCP Server vulnerabilities

CKAN MCP Server before version 0.4.106 has an SSRF vulnerability that allows bypassing the IP address filter using hostname aliases such as ip6-localhost, which are not equal to localhost and are not dotted IPv4 or bracketed IPv6 literals. A remote caller can force the server to connect to local or private addresses.

CKAN MCP Server before 0.4.112 contains a vulnerability in canonicalizeParams in src/utils/cache.ts that serializes request parameters with unescaped ampersand, equals-sign, and vertical-bar delimiters, allowing different logical parameter sets used by buildCacheKey to collide. An attacker can prime a shared cache with a response for a victim's distinct query.

CKAN MCP Server before 0.4.112 contains a vulnerability in the ckan_get_mqa_quality and ckan_get_mqa_quality_details tools in src/tools/quality.ts. The isValidMqaServer function validates the server_url parameter with a prefix-only regular expression for dati.gov.it, allowing suffix-host and URL-userinfo values to target an attacker-controlled host and return a spoofed response.

CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, error paths reflect raw upstream response bodies and internal exception messages back to the caller instead of a sanitized, generic message. When the server is pointed at (or redirected/SSRF'd to) a host that returns a non-CKAN response, or when an internal exception occurs, the caller receives verbatim upstream content and internal detail (hostnames, internal IPs, DB errors, stack fragments). This vulnerability is fixed in 0.4.112.