CVE-2026-56021

Webmin information disclosure via regex pattern

Published: Jun 18, 2026Updated: Jun 22, 2026 Sources: CVE List NVD csafCWE-185

NVD MITRE

5.3CVSSMEDIUM

Description

Webmin allows unauthenticated attackers to read the contents of any file ending in .conf within module directories, due to a bypassable regex pattern.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:LConfidentiality

Low

I:NIntegrity

None

A:NAvailability

None

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Weaknesses

CWE-185 CWE-777

Affected Products

Webmin Webmin

On-prem

DevTools & CI / build-test-tools

webminoss-projectDevTools & CIaka webmin, usermin, virtualmin

Exploitability

Official Patch Available

References

https://github.com/webmin/webmin/releases/tag/2.641

github.com

https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json

raw.githubusercontent.com

https://webmin.com/security/#webmin-prior-to-2641

webmin.com

and 3 more references View all →

Timeline

Published

Jun 18, 2026

Last Updated

Jun 22, 2026

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