{"id":"CVE-2026-75851","summary":"ArcadeDB before 26.8.1 Authentication Bypass via Async Command","details":"ArcadeDB server (com.arcadedb:arcadedb-server) in versions 26.7.3 and earlier fails to propagate the authenticated principal to asynchronous command worker threads. When an HTTP command is submitted with awaitResponse:false, it executes on an async worker whose DatabaseContext has no bound user, causing the scripting authorization gate to become a no-op. A user with only read access to a single database can submit an asynchronous JavaScript (language=js) command via the /api/v1/command endpoint to run code with unrestricted host access (e.g., database.getSecurity().createUser) and create a server-wide administrator, escalating to full administrative control. Fixed in 26.8.1.","aliases":["GHSA-5j4x-3jfw-8xv3"],"modified":"2026-09-02T03:30:18.392997943Z","published":"2026-08-18T11:19:55.216Z","database_specific":{"cwe_ids":["CWE-269"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75851.json","cna_assigner":"VulnCheck"},"references":[{"type":"ADVISORY","url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-5j4x-3jfw-8xv3"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75851.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-75851"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/arcadedb-before-authentication-bypass-via-async-command"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/arcadedata/arcadedb","events":[{"introduced":"0"},{"fixed":"87bdc67f1f0331fa2d07e932a550064c118eae70"}],"database_specific":{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"26.8.1"}]}}],"versions":["untagged-3026f5635164cd300b5b","26.7.2","26.7.1","26.6.1","26.5.1","26.4.2","26.3.2","26.3.1","26.2.1","26.1.1","25.12.1","25.11.1","25.10.1","25.9.1","25.8.1","25.7.1","25.6.1","25.4.1","25.3.2","25.3.1","25.2.1","25.1.1","24.11.2","24.11.1","24.10.1","24.6.1","24.5.1","24.4.1","24.2.1","24.1.1","23.12.2","23.12.1","23.11.1","23.10.1","23.9.1","23.7.1","23.6.1","23.5.1","23.4.1","23.3.1","23.2.1","23.1.2","23.1.1","22.12.1","22.11.1","22.10.1","22.9.1","22.8.1","22.6.1","22.2.1","22.1.3","22.1.2","21.12.1","21.11.1","21.10.2","21.10.1","21.9.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-75851.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:H/VI:H/VA:H/SC:H/SI:H/SA:H"}]}