{"id":"CVE-2026-93596","published":"2026-09-18T14:19:10.917","lastModified":"2026-09-18T18:18:29.093","description":"ArcadeDB before 26.9.1 (com.arcadedb:arcadedb-engine <= 26.8.1) fails to bind the authenticated principal onto the DatabaseAsyncTransaction async worker threads used by the parallel edge-connect phase of POST /api/v1/batch/{database}. Because those workers have no current user, LocalDatabase.checkPermissionsOnFile returns early and allows the write, bypassing per-type CREATE_RECORD/UPDATE_RECORD ACL enforcement. In deployments that rely on per-type or per-group ACLs, an authenticated low-privilege user holding CREATE_RECORD on an edge type E but with CREATE_RECORD/UPDATE_RECORD revoked on a vertex type V can submit a graph edge-load batch request (with parallelFlush at its default value of true) and durably append edges to protected vertices of type V by writing records into V's <V>_out_edges/<V>_in_edges buckets, resulting in unauthorized modification of graph adjacency. Setting parallelFlush=false causes the request to be correctly rejected. This is an incomplete fix of GHSA-c23x-pqcj-7hfm, which bound the principal only on the HTTP handler thread.","cvssScore":4.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","cwes":["CWE-862"],"vendors":[],"products":[],"references":[{"url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-27vw-j8qc-5h7x","tags":[]},{"url":"https://www.vulncheck.com/advisories/arcadedb-before-26.9.1-authorization-bypass-via-batch-edge-connect","tags":[]},{"url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-27vw-j8qc-5h7x","tags":[]}],"exploitRefs":[{"url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-27vw-j8qc-5h7x","tags":[]},{"url":"https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-27vw-j8qc-5h7x","tags":[]}],"hasPoc":true,"ai":null}