NocoDB is software for building databases as spreadsheets. Prior to 2026.05.1, an authenticated user with base-create permission can attach a SQLite source pointing at an arbitrary file on the NocoDB host, including NocoDB's own internal databases. The SQLite client and the base/integration create services accepted a caller-supplied filename and passed it to fs.exists and fs.open('w') without restricting the location. A user could point a source at noco.db, at a tenant database under nc_minimal_dbs/, or at any writable path the NocoDB process can reach, and then read or overwrite its contents through the regular table APIs.This vulnerability is fixed in 2026.05.1.