CVE-2026-61612 Details
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.
A server-side request forgery (SSRF) vulnerability has been identified in the @aborruso/ckan-mcp-server package, specifically in versions prior to 0.4.108. The vulnerability arises because the SSRF guard 'validateServerUrl' only checks the hostname string without resolving DNS. As a result, any server_url that resolves to an internal address is allowed, enabling requests to loopback and cloud metadata services. This vulnerability is a bypass of a previous fix and has been demonstrated to access the Instance Metadata Service (IMDS), which is more extensive than the impacts of CVE-2026-53509, which only reached loopback addresses.
Users can update to version 0.4.108 or later, where this vulnerability has been patched. The patch includes DNS resolution and validation to block access to internal IPs, as well as a mandatory HTTP allowlist for network-exposed transports.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 21, 2026CISA-ADP
Assessed Sep 21, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/advisories/GHSA-3xm7-qw7j-qc8v | [email protected] | AdvisoryBundleRemedyVendor |
| https://github.com/advisories/GHSA-g84h-j7jj-x32p | [email protected] | AdvisoryRemedyVendor |
| https://github.com/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40 | [email protected] | Source CodeVendor |
| https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.108 | [email protected] | Release NotesVendor |
| https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556 | [email protected] | AdvisoryBundleExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-918 | Server-Side Request Forgery (SSRF) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| @aborruso/ckan-mcp-server | <= 0.4.107 (semver) |
CPE
Remediation
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Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 21, 2026 | CVE Modified | CISA-ADP |
| Sep 21, 2026 | New CVE Received | [email protected] |