High severity8.1NVD Advisory· Published Jun 18, 2026· Updated Aug 11, 2026

CVE-2026-56020

Description

The Webmin HTTP server (miniserv.pl) allows unauthenticated attackers to impersonate any user with a configured SSL client certificate by sending a forged HTTP header. A remote attacker can spoof certificate DNs and authenticate as any user. Fixed in 2.202.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Webmin/Webminllm-fuzzy
Range: <2.641

Patches

Vulnerability mechanics

References

github.com/webmin/webmin/releases/tag/2.202nvd
raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.jsonnvd
webmin.com/security/nvd
www.cve.org/CVERecordnvd

News mentions

Critical Webmin Vulnerabilities Allow Attackers to Impersonate as Any User
Cyber Security News · Jun 24, 2026

cvss	0.526
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000