---
title: "CVE-2026-44221: ArcadeDB vulnerable to cross-database authorization bypass and unsecured newly-created databases"
url: https://erroneo.us/security/cve/CVE-2026-44221/
description: "CVE-2026-44221 (com.arcadedb:arcadedb-server (Maven)): ArcadeDB is a Multi-Model DBMS. Starting in version 21.10.1 and prior to version 26.4.2…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-05-12
date_modified: 2026-08-03
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-44221"
kev: false
cvss: 9
epss: 0.00429
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-44221: ArcadeDB vulnerable to cross-database authorization bypass and unsecured newly-created databases

**Signal:** Critical, preconditions apply. Severe if exploited, but exploitation needs conditions that may not apply to you. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 0.4% , percentile 36: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 36% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.
- Only applies if your dependency tree includes com.arcadedb:arcadedb-server (Maven) >= 21.10.1, < 26.4.2, fixed in 26.4.2 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

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

## Affected products (CVE record)

- ArcadeData arcadedb: >= 21.10.1, < 26.4.2

## Severity

- GitHub_M CVSS 3.1: 9 `CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.0 `CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.43% probability of exploitation activity in the next 30 days; percentile 36.

## Sources

- [GitHub Advisory GHSA-fxc7-fm93-6q77](https://github.com/advisories/GHSA-fxc7-fm93-6q77)
- [CVE.org record CVE-2026-44221](https://www.cve.org/CVERecord?id=CVE-2026-44221)
- [NVD entry CVE-2026-44221](https://nvd.nist.gov/vuln/detail/CVE-2026-44221)
- [github.com](https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-fxc7-fm93-6q77)
- [github.com](https://github.com/ArcadeData/arcadedb/commit/04110c06315da55604ac107f71fe7182f3a3deb8)
- [github.com](https://github.com/ArcadeData/arcadedb/commit/9e708f116b)

---
Source page: https://erroneo.us/security/cve/CVE-2026-44221/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt