---
id: CVE-2026-67344
title: >-
  ArcadeDB before 26.7.2 fails to enforce the UPDATE_SCHEMA database permission
  on the ALTER TYPE ..
summary: >-
  ArcadeDB before 26.7.2 fails to enforce the UPDATE_SCHEMA database permission
  on the ALTER TYPE ... CUSTOM and ALTER TYPE ... BUCKETSELECTIONSTRATEGY SQL
  operations, which map to setCustomValue and setBucketSelectionStrategy in
  LocalDocu…
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
published: '2026-08-01'
updated: '2026-08-01'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-67344'
references:
  - url: >-
      https://github.com/ArcadeData/arcadedb/security/advisories/GHSA-8vr5-263f-x5r3
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/arcadedb-before-authentication-bypass-via-alter-type
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-08-02T09:18:11.706Z'
epss: 0.00241
epssPercentile: 0.13641
---

## Overview

ArcadeDB before 26.7.2 fails to enforce the UPDATE_SCHEMA database permission on the ALTER TYPE ... CUSTOM and ALTER TYPE ... BUCKETSELECTIONSTRATEGY SQL operations, which map to setCustomValue and setBucketSelectionStrategy in LocalDocumentType. An authenticated user with only read access (e.g., a read-only API token) can submit these ALTER TYPE statements via the HTTP command endpoint to mutate a type's custom schema metadata and bucket-selection strategy, bypassing the documented updateSchema permission boundary and potentially corrupting schema metadata and record routing.

## Remediation

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