CVE-2026-61612mediumCWE-918

CVE-2026-61612: medium-severity vulnerability in ondata ckan-mcp-server

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

Published

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13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 5.7epss 0.4%
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:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Affected products
ondata · ckan-mcp-server
Related CVEs — ondata ckan-mcp-server

In the same product, most dangerous first.

CVE-2026-53509MEDIUM@aborruso/ckan-mcp-server: SSRF via base_url allows access to internal networks (Potential fix bypass of CVE-2026-33060)EPSS 0.4%CVE-2026-73845MEDIUMCKAN MCP Server: MQA server allowlist bypass via unanchored regex (`isValidMqaServer`)EPSS 0.4%CVE-2026-73844LOWCKAN MCP Server: Information disclosure via verbose error reflectionEPSS 0.4%CVE-2026-33060MEDIUMCKAN MCP Server: SSRF via base_url allows access to internal networksEPSS 0.3%CVE-2026-73846MEDIUMCKAN MCP Server: Cache-key canonicalization collision enables cache confusion / poisoningEPSS 0.2%