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Vulnerability record · CVE-2026-75851 · published 18 August 2026

CVE-2026-75851: Improper privilege management vulnerability

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.

9.4 CVSS 4.0 Critical EPSS 0.44% · top 64.1% CWE-269 · Improper privilege management Deferred
9.4CVSS 4.0 base score
0.44%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
31 Aug 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-75851), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.