CVE-2026-2728

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.

CVSS v3 4.8 MEDIUM

4.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.7 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

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

Configurations

Configuration 1 (hide)

cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:*

History

22 Apr 2026, 19:46

Type	Values Removed	Values Added
References	~~() https://projectblack.io/blog/librenms-authenticated-rce-and-xss/#xss-on-showconfig-page-2630 -~~	() https://projectblack.io/blog/librenms-authenticated-rce-and-xss/#xss-on-showconfig-page-2630 - Exploit, Third Party Advisory
First Time		Librenms librenms Librenms
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 4.8
CPE		cpe:2.3:a:librenms:librenms::::::::

13 Apr 2026, 11:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-04-13 11:16

Updated : 2026-04-22 19:46

NVD link : CVE-2026-2728

Mitre link : CVE-2026-2728

CVE.ORG link : CVE-2026-2728

JSON object : View

Products Affected

librenms

librenms

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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