ckan-mcp-server: DataStore Table UI resource does not validate postMessage origin (in) and posts to targetOrigin "*" (out)
影響: npm:@aborruso/ckan-mcp-server < 0.4.112 → 0.4.112
The MCP Apps UI resource (an interactive DataStore table rendered in the host's webview/iframe) communicates with its parent via postMessage. Its inbound message listener performs no event.origin validation, and its outbound messages are sent with target origin ''. Any window/frame able to reach the document can inject data into the table and interfere with the MCP UI handshake, and the UI's own JSON-RPC messages are broadcast without an origin restriction. Affected code src/resources/d…
Read on GitHub Advisory Database
| CVE | CVE-2026-76894 |
|---|---|
| Source | GitHub Advisory Database |
| Fetched | 10/22/2026, 01:17 AM |
| Data | Markdown JSON |
On 10/17/2026, 04:23 AM, GitHub Advisory Database published "ckan-mcp-server: DataStore Table UI resource does not validate postMessage origin (in) and posts to targetOrigin "*" (out)" (type: Advisory). Severity is "Low" (low). Related technologies: JavaScript / Node.js. CVE: CVE-2026-76894.