CVE-2026-61612
@aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509
CVSS Score
5.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-918 |
| Vendor | ondata |
| Product | ckan-mcp-server |
| Published | Sep 21, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
ondata / ckan-mcp-server
@aborruso/ckan-mcp-server
References
github.com: https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556 github.com: https://github.com/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40 github.com: https://github.com/advisories/GHSA-3xm7-qw7j-qc8v github.com: https://github.com/advisories/GHSA-g84h-j7jj-x32p github.com: https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.108