CVE-2026-49103

Unsafely Constructed Filename in Webmin Mailbox Attachment Saving Leads to Remote Code Execution

Published May 27, 2026 CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Title Unsafely Constructed Filename in Webmin Mailbox Attachment Saving Leads to Remote Code Execution
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
First Time appeared Webmin
Webmin webmin
Weaknesses CWE-24
CPEs cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:*
Vendors & Products Webmin
Webmin webmin
References
Metrics cvssV4_0

{'score': 9.4, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
mitre
Published
Updated
May 27, 2026, 4:14 PM
Reserved
May 27, 2026, 2:37 PM
Status
Deferred
Published
May 27, 2026, 3:16 PM
Modified
Jun 17, 2026, 10:55 AM