Vulnerability intelligence
CVE-2026-56020
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 2.641.
CVSS Score
9.2
Critical
EPSS — Exploit Probability
0.5%
Riskier than 40% of all CVEs
Exploitation
Not in CISA KEV
No federal exploitation record
Remediation
unknown
Check vendor advisories
1 article across 1 outlet · first covered Jun 24, 2026 · latest Jun 24, 2026
Coverage timeline
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Critical Webmin flaws expose authentication bypass and data leakssecurityonline.info · Jun 24, 2026