{"id":"CVE-2026-75845","summary":"ArcadeDB 26.4.2 before 26.8.1 Authorization Bypass via set_server_setting","details":"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.","aliases":["GHSA-pff6-hp53-pj54"],"modified":"2026-09-10T03:30:21.065350544Z","published":"2026-08-18T11:19:52.584Z","database_specific":{"cwe_ids":["CWE-269"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75845.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75845.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75845"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/arcadedb-before-authorization-bypass-via-set-server-setting"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/arcadedata/arcadedb","events":[{"introduced":"96a306bed54479737b22243d9fabbae68bae01cf"},{"fixed":"87bdc67f1f0331fa2d07e932a550064c118eae70"}],"database_specific":{"extracted_events":[{"introduced":"26.4.2"},{"fixed":"26.8.1"},{"fixed":"26.7.3"}],"source":["AFFECTED_FIELD","DESCRIPTION"]}}],"versions":["untagged-3026f5635164cd300b5b","26.7.2","26.7.1","26.6.1","26.5.1","26.4.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75845.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N"}]}