# CVE-2026-31215: ModelEngine-Group nexent arbitrary file deletion in ElasticSearch interface

Source: https://junglewise.ai/threats/cve-2026-31215-modelengine-group-nexent-arbitrary-file-deletion-in-elasticsearch  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-05-12. Updated: 2026-05-26  
License: CC BY 4.0 with a link back

CVE-2026-31215 · Severity: critical · CVSS 9.1 · Published 2026-05-12

A vulnerability in the nexent AI agent platform allows unauthorized individuals to delete critical data. By sending a specifically crafted request to the system's search interface, an attacker can permanently remove documents and storage files without needing a password. This can result in significant data loss and the disruption of services relying on the platform.

Technologies: [ModelEngine-Group Nexent](https://junglewise.ai/threats/technologies/nexent). Vendors: [ModelEngine-Group](https://junglewise.ai/threats/vendors/modelengine-group).

## Quick answers

**Is CVE-2026-31215 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-31215 being exploited in the wild.

**How severe is CVE-2026-31215?** Critical severity, with a CVSS score of 9.1, published 12 May 2026.

**Which products and versions are affected?** ModelEngine-Group Nexent 1.7.5.2.

**Is there a fix for CVE-2026-31215?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-31215 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-31215?** Check whether you run ModelEngine-Group Nexent 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

The nexent backend service (v1.7.5.2) is vulnerable to unauthorized arbitrary file deletion via its ElasticSearch service interface. The 'DELETE /{index_name}/documents' endpoint fails to implement proper authentication and authorization controls. Furthermore, the service does not validate the user-supplied 'path_or_url' parameter. An unauthenticated remote attacker can exploit this by sending crafted HTTP DELETE requests to remove arbitrary documents from ElasticSearch indices and their associated files within the MinIO storage system. This vulnerability is classified under CWE-552 (Files or Directories Accessible to External Parties).

## Affected products

- ModelEngine-Group nexent 1.7.5.2

## Timeline

- 2026-05-12: disclosed
- 2026-05-12: advisory

## References

- [https://github.com/ModelEngine-Group/nexent](https://github.com/ModelEngine-Group/nexent)
- [https://www.notion.so/CVE-2026-31215-35d1e139318881f5946ed206d96e34d8](https://www.notion.so/CVE-2026-31215-35d1e139318881f5946ed206d96e34d8)

## Related threats

- [Nexent missing authorization in file access](https://junglewise.ai/threats/cve-2026-110775-nexent-through-2-7-0-contains-a-missing-authorization)
- [ModelEngine-Group nexent arbitrary file deletion in file management API](https://junglewise.ai/threats/cve-2026-31216-modelengine-group-nexent-arbitrary-file-deletion-in-file)