Critical 9.6Published Sep 29, 2026

CVE-2026-49243Webmin: Reflected XSS in the Configuration module

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects webmin. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.29%, higher than 20% of scored CVEs.

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Exploited in the last 30 days

Webmin is a web-based system administration tool for Unix-like servers. Prior to version 2.650, Webmin users who click on a malicious link to their server are vulnerable to this XSS vulnerability that could be used to execute attacker-controlled commands. This issue has been patched in version 2.650.

CVSS: 9.6 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.29% (percentile 20)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

webmin webmin webmin:webmin (from the name)	before 2.650	CNA record

References

https://github.com/webmin/webmin/security/advisories/GHSA-hv4w-p8jq-2rp5x-refsource-confirm
https://github.com/webmin/webmin/commit/2d016751399ed0f4159e72a6cbcd63694a84dabfx-refsource-misc
https://beaksec.github.io/posts/webmin-one-click-rce-via-xssx-refsource-misc
https://github.com/webmin/webmin/releases/tag/2.650x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.