{"id":"CVE-2026-76894","revision":"0f17ea47ed534702bcb6f60b26bb1517","records":[{"revision":"0f17ea47ed534702bcb6f60b26bb1517","observedAt":"2026-11-04T20:55:56.22+00:00","statement":{"source":"nvd","id":"CVE-2026-76894","aliases":[],"title":"CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, the DataStore table UI in src/resources/datastore-table-ui.ts accepts window message events without validating event.origin and sends JSON-RPC messages through…","description":"CKAN MCP Server is a tool for querying CKAN open data portals. Prior to 0.4.112, the DataStore table UI in src/resources/datastore-table-ui.ts accepts window message events without validating event.origin and sends JSON-RPC messages through postMessage with a wildcard target origin. A frame that can reach the embedded document can inject fabricated fields or records, spoof pending ui/initialize responses, disrupt the MCP UI handshake, or receive outbound messages when the resource is embedded by an untrusted parent. Values are HTML escaped, so the demonstrated content injection is display spoofing rather than script execution, and exploitability depends on the host embedding model. This issue is fixed in version 0.4.112.","state":0,"publishedAt":"2026-11-03T21:17:43.24+00:00","modifiedAt":"2026-11-03T21:17:43.24+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N","score":3.1,"severity":"LOW"}],"references":["https://github.com/ondata/ckan-mcp-server/commit/3b827af72b228d42aa7b0d7dac5347d16af3f4e5","https://github.com/ondata/ckan-mcp-server/releases/tag/v0.4.112","https://github.com/ondata/ckan-mcp-server/security/advisories/GHSA-vqff-r82h-9crc"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-76894","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Received","weaknesses":["CWE-345","CWE-940"],"productCriteria":[],"sourceDates":{"published":"2026-11-03T21:17:43.240","lastModified":"2026-11-03T21:17:43.240"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-76894","identifiers":["CVE-2026-76894"]},"retained":false,"historicalAffected":[]}],"coverage":[]}