# CVE-2026-57898: Eclipse BaSyx Java Server SDK path traversal in AAS thumbnail API

Source: https://junglewise.ai/threats/cve-2026-57898-eclipse-basyx-java-server-sdk-path-traversal-in-aas-thumbnail-api  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-14. Updated: 2026-07-14  
License: CC BY 4.0 with a link back

CVE-2026-57898 · Severity: critical · CVSS 9 · Published 2026-07-14

Eclipse BaSyx is a software toolkit used to implement digital twins in industrial manufacturing. A security flaw in certain versions using a MongoDB database allows an unauthenticated attacker to write malicious files to the server's filesystem. This could lead to a complete system takeover, data loss, or service disruption.

Technologies: [Eclipse Foundation BaSyx Java Server SDK](https://junglewise.ai/threats/technologies/basyx-java-server-sdk). Vendors: [Eclipse Foundation](https://junglewise.ai/threats/vendors/eclipse-foundation).

## Quick answers

**Is CVE-2026-57898 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-57898 being exploited in the wild.

**How severe is CVE-2026-57898?** Critical severity, with a CVSS score of 9, published 14 July 2026.

**Which products and versions are affected?** Eclipse Foundation BaSyx Java Server SDK 2.0.0-milestone-05 to 2.0.0-milestone-12.

**Is there a fix for CVE-2026-57898?** A patch was published on 2026-07-14: Fixed in version 2.0.0-milestone-13 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-57898 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-57898?** Check whether you run Eclipse Foundation BaSyx Java Server SDK 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.

## Technical details

A path traversal vulnerability (CWE-22) exists in the AAS thumbnail API of the Eclipse BaSyx Java Server SDK when configured with a MongoDB backend. The application accepts a client-controlled 'fileName' parameter during thumbnail upload and fails to normalize or restrict it before using it as a filesystem path during retrieval. An unauthenticated remote attacker can upload malicious bytes with a traversal-style filename and then trigger a retrieval request to write that content to an arbitrary location on the server. This can be leveraged to achieve remote code execution (RCE) by overwriting critical system or application files. The issue is resolved in version 2.0.0-milestone-13.

## Affected products

- Eclipse Foundation BaSyx Java Server SDK 2.0.0-milestone-05 to 2.0.0-milestone-12

## Timeline

- 2026-07-14: advisory: NVD publication date
- 2026-07-14: disclosed: Public disclosure via Eclipse Foundation GitLab
- 2026-07-14: patched: Fixed in version 2.0.0-milestone-13

## References

- [https://gitlab.eclipse.org/security/cve-assignment/-/work_items/159](https://gitlab.eclipse.org/security/cve-assignment/-/work_items/159)

## Related threats

- [Eclipse BaSyx Java Server SDK SSRF in Operation Delegation](https://junglewise.ai/threats/cve-2026-7412-eclipse-basyx-java-server-sdk-ssrf-in-operation-delegation)
- [Eclipse BaSyx Java Server SDK path traversal in Submodel HTTP API](https://junglewise.ai/threats/cve-2026-7411-eclipse-basyx-java-server-sdk-path-traversal-in-submodel-http-api)