CVE-2026-26992
LibreNMS has Stored Cross-Site Scripting via unsanitized /port-groups name
Description
LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the port group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a port group, an HTTP POST request is sent to the Request-URI "/port-groups". The name of the newly created port group is stored in the value of the name parameter. After the port group is created, the entry is displayed along with relevant buttons such as Edit and Delete. This issue has been fixed in version 26.2.0.
INFO
Published Date :
Feb. 20, 2026, 3:16 a.m.
Last Modified :
Feb. 20, 2026, 4:20 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update LibreNMS to version 26.2.0.
- Ensure input sanitization for port group names.
- Review and update other input fields for sanitization.
Public PoC/Exploit Available at Github
CVE-2026-26992 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-26992.
| URL | Resource |
|---|---|
| https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f | Patch |
| https://github.com/librenms/librenms/pull/19042 | Issue Tracking |
| https://github.com/librenms/librenms/releases/tag/26.2.0 | Product Release Notes |
| https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-26992 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-26992
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
# مستودع asrar-mared هذا هو المستودع الرئيسي لمجموعة **المارد الرقمي**، نقطة التحكم المركزية التي تجمع كل المشاريع والميول التقنية تحت راية واحدة. يمثل الأساس الذي تُبنى عليه الفروع الأخرى، ويُدار منه كل شيء من تنظيم الكود إلى إدارة المجتمع. للاطلاع على المستودع: [asrar-mared](https://github.com/asrar-mared)
HTML CSS
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-26992 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-26992 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N Added CPE Configuration OR *cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:* versions up to (excluding) 26.2.0 Added Reference Type GitHub, Inc.: https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f Types: Patch Added Reference Type GitHub, Inc.: https://github.com/librenms/librenms/pull/19042 Types: Issue Tracking Added Reference Type GitHub, Inc.: https://github.com/librenms/librenms/releases/tag/26.2.0 Types: Product, Release Notes Added Reference Type GitHub, Inc.: https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x Types: Exploit, Third Party Advisory -
New CVE Received by [email protected]
Feb. 20, 2026
Action Type Old Value New Value Added Description LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the port group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a port group, an HTTP POST request is sent to the Request-URI "/port-groups". The name of the newly created port group is stored in the value of the name parameter. After the port group is created, the entry is displayed along with relevant buttons such as Edit and Delete. This issue has been fixed in version 26.2.0. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/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 Added CWE CWE-79 Added Reference https://github.com/librenms/librenms/commit/882fe6f90ea504a3732f83caf89bba7850a5699f Added Reference https://github.com/librenms/librenms/pull/19042 Added Reference https://github.com/librenms/librenms/releases/tag/26.2.0 Added Reference https://github.com/librenms/librenms/security/advisories/GHSA-93fx-g747-695x