---
id: CVE-2026-93596
title: >-
  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}
summary: >-
  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}. Be…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'
cwe:
  - CWE-862
vendor: ArcadeData
product: arcadedb
affected:
  - arcadedb < 26.9.1
published: '2026-09-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T18:18:29.093'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93596'
references:
  - url: >-
      https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-27vw-j8qc-5h7x
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/arcadedb-before-26.9.1-authorization-bypass-via-batch-edge-connect
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-27vw-j8qc-5h7x
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-18T17:50:26.944034Z'
ingestedAt: '2026-09-18T13:41:41.663Z'
epss: 0.00267
epssPercentile: 0.19087
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.