CVE-2026-75851

CRITICAL 9.9

ArcadeDB before 26.8.1 Authentication Bypass via Async Command

CVSS Score

9.9

EPSS Score

0.0%

EPSS Percentile

0th

ArcadeDB server (com.arcadedb:arcadedb-server) in versions 26.7.3 and earlier fails to propagate the authenticated principal to asynchronous command worker threads. When an HTTP command is submitted with awaitResponse:false, it executes on an async worker whose DatabaseContext has no bound user, causing the scripting authorization gate to become a no-op. A user with only read access to a single database can submit an asynchronous JavaScript (language=js) command via the /api/v1/command endpoint to run code with unrestricted host access (e.g., database.getSecurity().createUser) and create a server-wide administrator, escalating to full administrative control. Fixed in 26.8.1.

CWE	CWE-269
Vendor	arcadedata
Product	arcadedb
Published	Aug 18, 2026
Last Updated	Aug 18, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

ArcadeData / arcadedb

0 < 26.8.1

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-5j4x-3jfw-8xv3 vulncheck.com: https://www.vulncheck.com/advisories/arcadedb-before-authentication-bypass-via-async-command

Credits

🔍 manus-use