# CVE-2026-66391

## Summary

- **CVE ID:** CVE-2026-66391
- **Severity:** MEDIUM
- **CVSS Score:** 6.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N)
- **CWE:** CWE-330, CWE-693
- **Published:** Jul 27, 2026
- **Last Modified:** Jul 28, 2026

## Description

Use of Insufficiently Random Values, Protection Mechanism Failure vulnerability in Apache Wicket.

This issue affects Apache Wicket: from 9.0.0 through 9.23.0, from 10.0.0 through 10.9.0.

Users are recommended to upgrade to version 10.10.0, which fixes the issue.

## Affected Products

- Apache Software Foundation — Apache Wicket (9.0.0)
- Apache Software Foundation — Apache Wicket (10.0.0)

## References

- [CNA](https://lists.apache.org/thread/hfzcgjsbmmthzchtb8b8nv47d95scmqk)
- [CVE](http://www.openwall.com/lists/oss-security/2026/07/27/5)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.40%
- **EPSS Percentile:** 33.8

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