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.

CVE-2026-76894 · Severity: low · CVSS 3.1 · Published 2026-11-03

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.

Technologies: @aborruso/ckan-mcp-server (npm). Vendors: npm.

Quick answers

Is CVE-2026-76894 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-76894 being exploited in the wild.
How severe is CVE-2026-76894?
Low severity, with a CVSS score of 3.1, published 3 November 2026.
Which products and versions are affected?
@aborruso/ckan-mcp-server (npm) < 0.4.112, SEMVER:introduced=0,fixed=0.4.112.
Is there a fix for CVE-2026-76894?
Yes. @aborruso/ckan-mcp-server (npm): upgrade to 0.4.112 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
Am I affected by CVE-2026-76894?
Check whether you run @aborruso/ckan-mcp-server (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • @aborruso/ckan-mcp-server (npm): upgrade to 0.4.112 or later
    npm install @aborruso/ckan-mcp-server@0.4.112

Affected products

  • @aborruso/ckan-mcp-server (npm) < 0.4.112, SEMVER:introduced=0,fixed=0.4.112

Identifiers

  • CVE-2026-76894
  • GHSA-vqff-r82h-9crc

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