What’s Vulnerable › Vulnerabilities

CVE-2026-75845: ArcadeDB 26.4.2 before 26.8.1 Authorization Bypass via set_server_setting

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-18 · updated 2026-10-22
• Weakness: CWE-269

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.

Affected products

• ArcadeData arcadedb: from 26.4.2 before 26.8.1 — fixed in 26.8.1

How to fix

Upgrade to a fixed version: ArcadeData arcadedb 26.8.1. Check the vendor advisory for mitigations.

References

• https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54
• https://www.vulncheck.com/advisories/arcadedb-before-authorization-bypass-via-set-server-setting
• https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54

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