CVE-2026-75845

Medium

Description

ArcadeDB versions 26.4.2 through 26.7.3 contain an authorization bypass vulnerability in the set_server_setting MCP server-level tool. SetServerSettingTool.execute() gates only on the global allowAdmin flag and never checks the caller's role, so in an MCP deployment with allowAdmin=true and a non-root allowedUsers set, any authenticated read-only user can invoke set_server_setting to modify server GlobalConfiguration, enabling configuration tampering or denial of service. The issue is fixed in 26.8.1.

SeverityMedium

CVSS6.3

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-pff6-hp53-pj54

Affected products

Product	Affected versions	Fixed in
ArcadeData arcadedb	26.4.2 ≤ v < 26.8.1	26.8.1

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