CVE-2026-53509: @aborruso/ckan-mcp-server: SSRF via base_url allows access to internal networks (Potential fix bypass of CVE-2026-33060)

July 7, 2026

A known vulnerability CVE-2026-33060 indicated tools including ckan_package_search and sparql_query that accept a base_url parameter had the risk of making HTTP requests to arbitrary endpoints without restriction. A fix was applied to filter out ip addresses. However, a method to bypass exists.

References

github.com/advisories/GHSA-3xm7-qw7j-qc8v
github.com/advisories/GHSA-g84h-j7jj-x32p
github.com/ondata/ckan-mcp-server/releases/tag/v0.4.106
github.com/ondata/ckan-mcp-server/security/advisories/GHSA-g84h-j7jj-x32p
nvd.nist.gov/vuln/detail/CVE-2026-53509

Code Behaviors & Features

Detect and mitigate CVE-2026-53509 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →