{"id":"CVE-2026-75851","state":"PUBLISHED","title":"ArcadeDB before 26.8.1 Authentication Bypass via Async Command","description":"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.","publishedAt":"2026-08-18T11:19:55.216Z","updatedAt":"2026-08-18T13:30:19.587Z","severity":{"score":9.4,"label":"Critical","version":"4.0","vector":"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","source":"VulnCheck"},"assigner":"VulnCheck","products":["ArcadeData arcadedb"],"affected":[{"vendor":"ArcadeData","product":"arcadedb","packageURL":"pkg:maven/com.arcadedb/arcadedb-server","defaultStatus":"unaffected","versions":[{"version":"0","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-5j4x-3jfw-8xv3","https://www.vulncheck.com/advisories/arcadedb-before-authentication-bypass-via-async-command"],"weaknesses":["CWE-269"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/75xxx/CVE-2026-75851.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-75851","state":"PUBLISHED","datePublished":"2026-08-18T11:19:55.216Z","dateUpdated":"2026-08-18T13:30:19.587Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-08-18T11:03:08.681Z"},"containers":{"cna":{"title":"ArcadeDB before 26.8.1 Authentication Bypass via Async Command","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"ArcadeData","product":"arcadedb","packageURL":"pkg:maven/com.arcadedb/arcadedb-server","defaultStatus":"unaffected","versions":[{"version":"0","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-5j4x-3jfw-8xv3","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-5j4x-3jfw-8xv3)"},{"url":"https://www.vulncheck.com/advisories/arcadedb-before-authentication-bypass-via-async-command","name":"VulnCheck Advisory: ArcadeDB before 26.8.1 Authentication Bypass via Async Command","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:H/VI:H/VA:H/SC:H/SI:H/SA:H","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"HIGH","subIntegrityImpact":"HIGH","subAvailabilityImpact":"HIGH","baseScore":9.4,"baseSeverity":"CRITICAL"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":9.9,"baseSeverity":"CRITICAL"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-269","lang":"en","description":"Improper Privilege Management","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-08-18T11:19:55.216Z"},"datePublic":"2026-08-04T00:00:00.000Z","credits":[{"lang":"en","value":"manus-use","type":"reporter"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-5j4x-3jfw-8xv3","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-18T13:28:16.317157Z","id":"CVE-2026-75851","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-18T13:30:19.587Z"}}]}}}