CVE-2026-61612
mediumCKAN MCP Server is a tool for querying CKAN open data portals.
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/advisories/GHSA-3xm7-qw7j-qc8v security-advisories@github.com
- https://github.com/advisories/GHSA-g84h-j7jj-x32p security-advisories@github.com
- https://github.com/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40 security-advisories@github.com
- https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.108 security-advisories@github.com
- https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556 security-advisories@github.com