CVE-2026-49103: Critical severity Webmin Webmin vulnerability
Published May 27, 2026
·Updated
Webmin before 2.640 does not safely construct a filename for saving of an attachment within the mailboxes component. This occurs in mailboxes/detachall.cgi.
Affected Software
1 affected component
Webmin Webmin<2.640
Event History
May 27, 2026
CVE Published
via MITRE·02:37 PM
Data Sourced
via MITRE·02:37 PM
DescriptionWeakness
Data Sourced
via NVD·03:16 PM
DescriptionSeverityWeakness
Frequently Asked Questions
1
What is the severity of CVE-2026-49103?
CVE-2026-49103 has a critical severity rating of 9.4.
2
How do I fix CVE-2026-49103?
To fix CVE-2026-49103, upgrade Webmin to version 2.640 or later.
3
What kind of vulnerability is CVE-2026-49103?
CVE-2026-49103 is a file inclusion vulnerability affecting the mailboxes component of Webmin.
4
Can CVE-2026-49103 be exploited remotely?
Yes, CVE-2026-49103 can be exploited remotely due to its nature as a web application vulnerability.
5
What products are affected by CVE-2026-49103?
CVE-2026-49103 affects Webmin versions prior to 2.640.