{"id":"CVE-2026-61612","published":"2026-09-21T18:17:09.073","lastModified":"2026-09-21T21:17:06.887","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.","cvssScore":5.7,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N","cwes":["CWE-918"],"vendors":[],"products":[],"references":[{"url":"https://github.com/advisories/GHSA-3xm7-qw7j-qc8v","tags":[]},{"url":"https://github.com/advisories/GHSA-g84h-j7jj-x32p","tags":[]},{"url":"https://github.com/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40","tags":[]},{"url":"https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.108","tags":[]},{"url":"https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556","tags":[]}],"exploitRefs":[{"url":"https://github.com/advisories/GHSA-3xm7-qw7j-qc8v","tags":[]},{"url":"https://github.com/advisories/GHSA-g84h-j7jj-x32p","tags":[]},{"url":"https://github.com/ondata/ckan-mcp-server/commit/bb7439b553b9f965adc3d43bcd415c42eebe2f40","tags":[]},{"url":"https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.108","tags":[]},{"url":"https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-798p-78g2-v556","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows SSRF attacks by not fully validating server URLs, enabling requests to internal addresses like loopback and cloud metadata.","exploitability":"Exploitation requires control over the `server_url` parameter and network access to internal addresses; moderate difficulty due to DNS resolution bypass.","blast_radius":"If exploited, could lead to unauthorized data access or manipulation of internal services through IMDS.","remediation":"Update to CKAN MCP Server version 0.4.108 or later to apply the updated fix.","tags":["ssrf","internal-access","update","security"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-22T06:24:11.529Z"}}