CVE-2026-75851
ArcadeDB before 26.8.1 Authentication Bypass via Async Command
- State
- Published
- Severity
- 9.4 Critical
- Published
- Aug 18, 2026
- Updated
- Aug 18, 2026
- Reserved
- Aug 18, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.4 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H | VulnCheck |
| 3.1 | 9.9 Critical | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-269 Improper Privilege Management
Affected Products
| Product | Versions |
|---|---|
arcadedbArcadeData |
|
References
- GitHub Security Advisory (GHSA-5j4x-3jfw-8xv3)vendor-advisory
- VulnCheck Advisory: ArcadeDB before 26.8.1 Authentication Bypass via Async Commandthird-party-advisory
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