# CVE-2026-56022

## Summary

- **CVE ID:** CVE-2026-56022
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-308
- **Published:** Jun 18, 2026
- **Last Modified:** Aug 11, 2026

## Description

Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.641.

## Affected Products

- Webmin — Webmin (0)
- Webmin — Webmin (2.641)
- Webmin — Webmin (2.640)

## References

- [CNA](https://webmin.com/security/#webmin-prior-to-2641)
- [CNA](https://github.com/webmin/webmin/releases/tag/2.641)
- [CNA](https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json)
- [CNA](https://www.cve.org/CVERecord?id=CVE-2026-56022)
- [CNA](https://webmin.com/security/#webmin-prior-to-2640)
- [CNA](https://github.com/webmin/webmin/releases/tag/2.640)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.56%
- **EPSS Percentile:** 44.5

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._