ArcadeDB: Privilege escalation via reader role in /api/v1/command JS scripting language — arbitrary host file read (CVE-2026-65831) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-65831

ArcadeDB: Privilege escalation via reader role in /api/v1/command JS scripting language — arbitrary host file read

Answer in brief

CVE-2026-65831 records a Unknown severity vulnerability in ArcadeDB: Privilege escalation via reader role in /api/v1/command JS scripting language — arbitrary host file read. The current sources do not mark it as known exploited. The current feed maps ArcadeData/arcadedb (generic), com.arcadedb/arcadedb-server (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 15, 2026Source checked Sep 15, 2026First seen by HOL Sep 15, 2026Material review Sep 15, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps ArcadeData/arcadedb (generic), com.arcadedb/arcadedb-server (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
ArcadeData/arcadedbgeneric	< 26.7.1	Not reported
com.arcadedb/arcadedb-servergeneric	< 26.7.1	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for ArcadeData/arcadedb, com.arcadedb/arcadedb-server.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 15, 2026

Sources and claim methodology

Upstream source description

ArcadeDB is a Multi-Model DBMS. Prior to 26.7.1, a reader-role user can submit POST /api/v1/command/{database} with language: js because PolyglotQueryEngine.command, PolyglotQueryEngine.analyze, and PolyglotQueryEngine.registerFunctions do not enforce database-administrator authorization. GraalPolyglotEngine also permits scripts to bypass the allowedPackages whitelist by reflecting from the bound database object through database.getClass().getClassLoader().loadClass to arbitrary host classes. These cooperating defects allow a read-only database user to read arbitrary host files outside the database scope. Process creation is already blocked, so OS command execution is not confirmed. The issue is distinct from CVE-2026-44221, CVE-2026-54076, and CVE-2026-54077. This issue is fixed in version 26.7.1.

Quoted source text, attributed separately from HOL analysis.