{"id":"CVE-2026-75845","title":"ArcadeDB versions 26.4.2 through 26.7.3 contain an authorization bypass vulnerability in the set_server_setting MCP server-level tool","summary":"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 …","severity":"medium","cvss":6.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-269"],"published":"2026-08-18","updated":"2026-09-08","sourceUpdated":"2026-09-08T20:32:39.347","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-75845","references":[{"url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/arcadedb-before-authorization-bypass-via-set-server-setting","label":"disclosure@vulncheck.com"},{"url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd"],"epss":0.00209,"epssPercentile":0.11345,"ingestedAt":"2026-09-08T21:11:12.280Z","slug":"CVE-2026-75845","body":"## Overview\n\nArcadeDB 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":35,"depthScoreParts":{"impact":34.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}