---
id: CVE-2026-44221
title: ArcadeDB is a Multi-Model DBMS
summary: >-
  ArcadeDB is a Multi-Model DBMS. Starting in version 21.10.1 and prior to
  version 26.4.2, 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 …
severity: critical
cvss: 9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H'
cwe:
  - CWE-863
published: '2026-05-12'
updated: '2026-08-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-44221'
references:
  - url: >-
      https://github.com/ArcadeData/arcadedb/commit/04110c06315da55604ac107f71fe7182f3a3deb8
    label: security-advisories@github.com
  - url: 'https://github.com/ArcadeData/arcadedb/commit/9e708f116b'
    label: security-advisories@github.com
  - url: >-
      https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-fxc7-fm93-6q77
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00429
epssPercentile: 0.34454
ingestedAt: '2026-08-03T21:30:01.285Z'
---

## Overview

ArcadeDB is a Multi-Model DBMS. Starting in version 21.10.1 and prior to version 26.4.2, 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. This vulnerability is fixed in 26.4.2.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.