CVE-2026-49103

Name: CVE-2026-49103
Creator: NVD / NIST
Published: 2026-05-27T15:16:34.17+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.4/10EPSS 0.30%

Last modified Jun 17, 2026

CVE-2026-49103 is a critical-severity vulnerability rated 9.4/10 on the CVSS scale. 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.. EPSS estimates a 0.30% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 4.0

9.4/10

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.30%

22.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-24

References

Timeline

Published: May 27, 2026
Last Modified: Jun 17, 2026
Status: Deferred

Frequently Asked Questions

What is CVE-2026-49103?

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.

How severe is CVE-2026-49103?

CVE-2026-49103 has a CVSS score of 9.4/10 (CRITICAL severity). The EPSS model estimates a 0.30% probability of exploitation in the next 30 days.

How do I fix CVE-2026-49103?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-49103?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST