GHSA-fxc7-fm93-6q77 ArcadeDB vulnerable to cross-database authorization bypass and unsecured newly-created databases

• Maven com.arcadedb:arcadedb-server: >= 21.10.1, < 26.4.2 → fixed in 26.4.2

Impact Authenticated users and API tokens scoped to a specific database could read, write, and mutate schema on any other database on the same server. Two distinct defects contributed: (1) ServerSecurityUser.getDatabaseUser() returned a DB user with an uninitialized fileAccessMap, which requestAccessOnFile treated as allow-all; (2) ArcadeDBServer.createDatabase() omitted factory.setSecurity(...) so any database created via POST /api/v1/server {"command":"create database X"} had its entire record-level authorization system silently disabled. In combination, record-level and database-level authorization could be bypassed by any authenticated principal. Patches Upgrade to version 26.4.2 Resources https://github.com/ArcadeData/arcadedb/commit/04110c06315da55604ac107f71fe7182f3a3deb8