# CVE-2026-42797

## Summary

- **CVE ID:** CVE-2026-42797
- **Severity:** MEDIUM
- **CVSS Score:** 4.9 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N)
- **CWE:** CWE-202
- **Published:** May 25, 2026
- **Last Modified:** May 26, 2026

## Description

Exposure of Sensitive Information Through Data Queries vulnerability in Apache Syncope.

An administrator with adequate entitlements for Derived Schemas can create a malicious JEXL expression which allows any administrator with sufficient entitlements for User read to access User-related security-sensitive information.

This issue affects Apache Syncope: 3.0 through 3.0.16, 4.0 through 4.0.5, 4.1.0.

Users are recommended to upgrade to version 4.0.6 / 4.1.1, which fix this issue by further restricting the JEXL expression definition.

## Affected Products

- Apache Software Foundation — Apache Syncope (3.0)
- Apache Software Foundation — Apache Syncope (4.0)
- Apache Software Foundation — Apache Syncope (4.1)

## References

- [CNA](https://lists.apache.org/thread/5y7d277sntyytrmxnx2tfjr9ftcpq1s6)
- [CVE](http://www.openwall.com/lists/oss-security/2026/05/25/5)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.44%
- **EPSS Percentile:** 36.9

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