{"id":"CVE-2026-75845","state":"PUBLISHED","title":"ArcadeDB 26.4.2 before 26.8.1 Authorization Bypass via set_server_setting","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.","publishedAt":"2026-08-18T11:19:52.584Z","updatedAt":"2026-08-18T15:12:23.061Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["ArcadeData arcadedb"],"affected":[{"vendor":"ArcadeData","product":"arcadedb","defaultStatus":"unaffected","versions":[{"version":"26.4.2","status":"affected","lessThan":"26.8.1","versionType":"semver"},{"version":"26.8.1","status":"unaffected","versionType":"semver"}]}],"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"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/75xxx/CVE-2026-75845.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-75845","state":"PUBLISHED","datePublished":"2026-08-18T11:19:52.584Z","dateUpdated":"2026-08-18T15:12:23.061Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-18T10:59:33.701Z"},"containers":{"cna":{"title":"ArcadeDB 26.4.2 before 26.8.1 Authorization Bypass via set_server_setting","descriptions":[{"lang":"en","value":"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":[{"vendor":"ArcadeData","product":"arcadedb","defaultStatus":"unaffected","versions":[{"version":"26.4.2","status":"affected","lessThan":"26.8.1","versionType":"semver"},{"version":"26.8.1","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-pff6-hp53-pj54)"},{"url":"https://www.vulncheck.com/advisories/arcadedb-before-authorization-bypass-via-set-server-setting","name":"VulnCheck Advisory: ArcadeDB 26.4.2 before 26.8.1 Authorization Bypass via set_server_setting","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"LOW","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.3,"baseSeverity":"MEDIUM"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"LOW","baseScore":6.3,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"Improper Privilege Management","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-18T11:19:52.584Z"},"datePublic":"2026-08-04T00:00:00.000Z","credits":[{"lang":"en","value":"dapickle","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-pff6-hp53-pj54","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-18T15:11:53.595854Z","id":"CVE-2026-75845","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-18T15:12:23.061Z"}}]}}}