Medium 5.7Published Sep 21, 2026

CVE-2026-61612@aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509

Updated under an hour ago (Oct 26, 2026, 9:00 PM ET)

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Exploited in the last 30 days

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: 5.7 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 21, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

ondata ckan-mcp-server ondata:ckan_mcp_server (from the name)	@aborruso/ckan-mcp-server	CNA record

References

References

https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556	x-refsource-confirm
https://github.com/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40	x-refsource-misc
https://github.com/advisories/GHSA-3xm7-qw7j-qc8v	x-refsource-misc
https://github.com/advisories/GHSA-g84h-j7jj-x32p	x-refsource-misc
https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.108	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.