NocoDB: Server-Side Request Forgery via Spreadsheet Fetch URL

Summary

The spreadsheet-fetch endpoint (axiosRequestMake) accepted URLs whose path contained a permitted extension anywhere in the string, and applied a hand-rolled regex blocklist that omitted 127.0.0.0/8 and 169.254.0.0/16, allowing the cloud-metadata endpoint to be reached with a crafted URL.

Details

The extension matcher is now anchored to the end of the path or immediately before the query string (/\.(xls|xlsx|xlsm|ods|ots)(\?|$)/i and /\.(csv)(\?|$)/i), so http://169.254.169.254/credentials/.xlsx no longer satisfies the format gate. The hand-rolled IP blocklist is removed in favour of useAgent(url) from request-filtering-agent, which blocks private and loopback ranges at the socket layer.

Impact

Authenticated users with editor permission could read cloud metadata and other internal HTTP endpoints reachable from the NocoDB process. On affected installs the spreadsheet import path was a credential-exfiltration primitive on cloud hosts.

Credit

This issue was reported by Devel Group Security Research Team through @TREXNEGRO. It was independently reported by @l3tchupkt.