CVE-2026-73844: CKAN MCP Server: Information disclosure via verbose error reflection

September 3, 2026

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).

References

github.com/advisories/GHSA-6f9w-9hf2-5rg3
github.com/ondata/ckan-mcp-server/commit/3b827af72b228d42aa7b0d7dac5347d16af3f4e5
github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112
github.com/ondata/ckan-mcp-server/security/advisories/GHSA-6f9w-9hf2-5rg3
nvd.nist.gov/vuln/detail/CVE-2026-73844

Code Behaviors & Features

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