Vulnerability · Published Jun 18, 2026 · Assigned by cisa-cg
CVE-2026-56021Webmin information disclosure via regex pattern
Medium 5.3
In plain English
A medium-severity security flaw in Webmin from Webmin. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities).
Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.5%top 58.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Webmin allows unauthenticated attackers to read the contents of any file ending in .conf within module directories, due to a bypassable regex pattern.
Affected products (as reported)
Weakness: CWE-185, CWE-777 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N