# CVE-2026-65831: ArcadeDB privilege escalation in polyglot scripting engine

Source: https://junglewise.ai/threats/cve-2026-65831-arcadedb-privilege-escalation-in-polyglot-scripting-engine  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-65831 · Severity: high · CVSS 7.7 · Published 2026-09-15

ArcadeDB is a multi-model database system. Users with read-only database access were able to execute JavaScript code and read arbitrary files from the host system outside the database scope due to missing authorization checks and a sandbox bypass. This could allow a read-only database user to exfiltrate sensitive files and data from the host system.

Technologies: [ArcadeData ArcadeDB](https://junglewise.ai/threats/technologies/arcadedb), [com.arcadedb:arcadedb-server (Maven)](https://junglewise.ai/threats/technologies/com-arcadedb-arcadedb-server). Vendors: [ArcadeData](https://junglewise.ai/threats/vendors/arcadedata), [Maven](https://junglewise.ai/threats/vendors/maven).

## Quick answers

**Is CVE-2026-65831 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-65831 being exploited in the wild.

**How severe is CVE-2026-65831?** High severity, with a CVSS score of 7.7, published 15 September 2026.

**Which products and versions are affected?** ArcadeData ArcadeDB prior to 26.7.1; com.arcadedb:arcadedb-server (Maven) ECOSYSTEM:introduced=0,fixed=26.7.1.

**Is there a fix for CVE-2026-65831?** Yes. com.arcadedb:arcadedb-server (Maven): upgrade to 26.7.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-65831 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-65831?** Check whether you run ArcadeData ArcadeDB or com.arcadedb:arcadedb-server (Maven) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- com.arcadedb:arcadedb-server (Maven): upgrade to 26.7.1 or later

  ```sh
  # set com.arcadedb:arcadedb-server to 26.7.1 in your pom.xml or build.gradle
  ```


## Technical details

ArcadeDB's polyglot query engine (PolyglotQueryEngine.command, PolyglotQueryEngine.analyze, and PolyglotQueryEngine.registerFunctions) failed to enforce database-administrator authorization on the POST /api/v1/command/{database} endpoint when language is set to JavaScript. Additionally, the GraalVM polyglot engine's allowedPackages whitelist could be bypassed via reflection—an attacker could call database.getClass().getClassLoader().loadClass() to load arbitrary host classes. These cooperating defects allowed a read-only database user to execute arbitrary JavaScript and read arbitrary files outside the database scope. OS command execution is blocked by separate restrictions. The vulnerability was fixed in version 26.7.1 by requiring UPDATE_SECURITY authorization on polyglot operations and hardening the GraalVM sandbox to deny Class/ClassLoader/java.lang.reflect member access.

## Affected products

- ArcadeData ArcadeDB prior to 26.7.1

## Identifiers

- CVE-2026-65831
- GHSA-48qw-824m-86pr

## Timeline

- 2026-09-15: disclosed: Published on NVD
- 2026-07-01: patched: Fixed in version 26.7.1

## References

- [https://github.com/ArcadeData/arcadedb/commit/8ca396c07e471a0b97fee075eeb956b5e24a23be](https://github.com/ArcadeData/arcadedb/commit/8ca396c07e471a0b97fee075eeb956b5e24a23be)
- [https://github.com/ArcadeData/arcadedb/releases/tag/26.7.1](https://github.com/ArcadeData/arcadedb/releases/tag/26.7.1)

## Related threats

- [ArcadeDB improper authorization in wire-protocol connections](https://junglewise.ai/threats/cve-2026-119577-arcadedb-before-26-10-2-contains-an-improper-authorization)
- [ArcadeDB authorization bypass in GraphQL schema endpoint](https://junglewise.ai/threats/cve-2026-119576-arcadedb-from-21-12-1-before-26-10-2-contains-an-authorization)
- [ArcadeDB server-side request forgery in LOAD CSV](https://junglewise.ai/threats/cve-2026-119575-arcadedb-from-26-8-1-before-26-10-2-contains-a-server-side)
- [ArcadeDB remote code execution in Gremlin Groovy engine](https://junglewise.ai/threats/cve-2026-114059-arcadedb-before-26-10-1-contains-a-remote-code-execution)
- [ArcadeDB Bolt protocol missing authorization](https://junglewise.ai/threats/cve-2026-114058-arcadedb-from-26-2-1-before-26-10-1-contains-a-missing)