Critical severity · published May 27, 2026
CVE-2026-49103
Webmin before 2.640 does not safely construct a filename for saving of an attachment within the mailboxes component
9.4
CVSS
0.4%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
Webmin · Webmin
before 2.640 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-49103
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-49103
github.com
https://github.com/webmin/webmin/commit/cf432879a14568c4bb44cd2f9e5a9bd0e168edc1
github.com
https://github.com/webmin/webmin/compare/2.630...2.640
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