Privilege escalation in Arcadedata Arcadedb
CVE-2026-75845
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.
Vulnerability class: Privilege Escalation
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
Weakness classification (CWE)
References
- disclosure@vulncheck.com (vendor-advisory)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-75845?
- CVE-2026-75845 is a medium-severity vulnerability in Arcadedata Arcadedb, classified under Improper Privilege Management. CVSS score: 6.3/10. Published 2026-08-18.
- How severe is CVE-2026-75845?
- Medium severity. CVSS v3 base score is 6.3 out of 10.