CVE WatchNov 3, 2026

CVE-2026-76894

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.

CVSS

3.1

Low

EPSS

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KEV

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Exploit Today

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0-100

Published: Nov 3, 2026 · Last modified: Nov 3, 2026 · CWE-345 · CWE-940

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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