CVE-2026-2728

Name: CVE-2026-2728
Creator: NVD / NIST
Published: 2026-04-13T11:16:05.407+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 4.6/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2026-2728 is a medium-severity vulnerability rated 4.6/10 on the CVSS scale. LibreNMS versions before 26.3.0 are affected by an authenticated Cross-site Scripting vulnerability on the showconfig page. Successful exploitation requires administrative privileges. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

LibreNMS versions before 26.3.0 are affected by an authenticated Cross-site Scripting vulnerability on the showconfig page. Successful exploitation requires administrative privileges. Exploitation could result in XSS attacks being performed against other users with access to the page.

Metrics

CVSS 3.1

4.8/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N

CVSS 4.0

4.6/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N/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

0.22%

13.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-79

Affected Software

Vendor	Product	Versions
Librenms	Librenms	< 26.3.0

References

https://projectblack.io/blog/librenms-authenticated-rce-and-xss/#xss-on-showconfig-page-2630Exploit, Third Party Advisory

Timeline

Published: Apr 13, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-2728?

How severe is CVE-2026-2728?

CVE-2026-2728 has a CVSS score of 4.6/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2026-2728?

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-2026-2728?

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

Scan your code now

Source: NVD / NIST