CVE-2026-56022

VendorwebminProductwebminDiscoveredJun 18, 2026UpdatedAug 11, 2026

Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.

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CVSS v3.1

5.3 MEDIUM

EPSS

0.56%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

ScopeUNCHANGED

ConfidentialityNONE

IntegrityLOW

AvailabilityNONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Connections

2 relationships

webmin

source

Timeline

disclosure → media coverage

Jun 18, 2026

Disclosure — published as a CVE record. · last revised by NVD Aug 11, 2026