CVE-2026-75851

Critical

Description

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.

SeverityCritical

CVSS9.9

Exploit probability—

ProductArcadedata Arcadedb

PublishedAug 18, 2026

First seenAug 18, 2026

Weakness typeCWE-269Improper privilege management

How to fix

Update

ArcadeData arcadedb26.8.1 or later

Vendor advisories

github.com/ArcadeData/arcadedb/security/advisories/GHSA-5j4x-3jfw-8xv3

Affected products

Product	Affected versions	Fixed in
ArcadeData arcadedb	v < 26.8.1	26.8.1

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