CVE-2026-61612

Medium

Description

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.

SeverityMedium

CVSS5.7

Exploit probability—

Product@aborruso/ckan-mcp-server

PublishedSep 21, 2026

First seenSep 21, 2026

Weakness typeCWE-918Server-side request forgery (SSRF)

How to fix

Update

@aborruso/ckan-mcp-server0.4.108 or later

Affected products

Product	Affected versions	Fixed in
@aborruso/ckan-mcp-servernpm	v < 0.4.108	0.4.108

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