Vulnerability · Published Sep 21, 2026 · Assigned by GitHub_M
CVE-2026-61612@aborruso/ckan-mcp-server has SSRF via DNS-name → internal IP — incomplete fix of CVE-2026-53509
Medium 5.7
In plain English
A medium-severity server-side request forgery in ckan-mcp-server from ondata. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 34% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @aborruso/ckan-mcp-server | 0.4.108 | GHSA-798p-78g2-v556 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ondata | ckan-mcp-server | @aborruso/ckan-mcp-server |
Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
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