# CVE-2026-53405

## Summary

- **CVE ID:** CVE-2026-53405
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-653
- **Published:** Jul 20, 2026
- **Last Modified:** Jul 21, 2026

## Description

Improper Isolation or Compartmentalization vulnerability in Apache Syncope.

An administrator with adequate entitlements can import arbitrary BPMN process definitions via the REST API and then start the process. When a BPMN process containing a Groovy scriptTask is imported and started, the Groovy script is executed directly on the server, with no sandbox.


This issue affects Apache Syncope: from 3.0.0-M0 through 3.0.16, from 4.0.0-M0 Through 4.0.6, from 4.1.0-M0 through 4.1.1.




Users are recommended to upgrade to version 4.0.7 / 4.1.2, which fix this issue by wrapping Flowable's Groovy scriptTasks with security sandbox.

## Affected Products

- Apache Software Foundation — Apache Syncope (3.0.0-M0)
- Apache Software Foundation — Apache Syncope (4.0.0-M0)
- Apache Software Foundation — Apache Syncope (4.1.0-M0)

## References

- [CNA](https://lists.apache.org/thread/vdq0tk6ylffz6trbgbllj9kb1ndzff7k)
- [CVE](http://www.openwall.com/lists/oss-security/2026/07/20/6)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.75%
- **EPSS Percentile:** 52.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._