CVE-2026-56021
Received Received - Intake
Unauthenticated File Read in Webmin via Bypassed Regex

Publication date: 2026-06-18

Last updated on: 2026-06-18

Assigner: Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government

Description
Webmin allows unauthenticated attackers to read the contents of any file ending in .conf within module directories, due to a bypassable regex pattern.
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Meta Information
Published
2026-06-18
Last Modified
2026-06-18
Generated
2026-06-19
AI Q&A
2026-06-18
EPSS Evaluated
N/A
NVD
CVE-2026-56021
EUVD
EUVD-2026-37908
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
webmin webmin *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-185 The product specifies a regular expression in a way that causes data to be improperly matched or compared.
CWE-777 The product uses a regular expression to perform neutralization, but the regular expression is not anchored and may allow malicious or malformed data to slip through.
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Executive Summary

This vulnerability in Webmin allows unauthenticated attackers to read the contents of any file ending in .conf within module directories. This happens because of a bypassable regular expression pattern that fails to properly restrict access.

Impact Analysis

An attacker exploiting this vulnerability can access configuration files without authentication. This could lead to exposure of sensitive configuration data, potentially compromising system security or revealing information that could be used in further attacks.

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