Signal is active with 2 mentions in latest observed window
Recommended action window: Monitor and triage in normal cycle
NVD description
LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the device group name is not sanitized, allowing attackers with admin privileges to perform Stored Cross-Site Scripting (XSS) attacks. When a user adds a device group, an HTTP POST request is sent to the Request-URI "/device-groups". The name of the newly created device group is stored in the value of the name parameter. After the device group is created, the entry is displayed along with relevant buttons such as Rediscover Devices, Edit, and Delete. This issue has been fixed in version 26.2.0.
Priority
LOW
Exploitation
NONE
PoC
YES
Patch
AVAILABLE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-26991 Stored XSS Vulnerability in LibreNMS Device Group Name Management https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-26991
Post summary
The text announces CVE-2026-26991, a stored XSS flaw in LibreNMS Device Group Name Management, and links to a vulnerability details page, but provides no PoC, exploit, patch, or active exploitation information.
CVE-2026-26991 LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. In versions 26.1.1 and below, the device group name is not sanitized, allowing attackers… https://www.cve.org/CVERecord?id=CVE-2026-26991
Post summary
The post highlights a sanitation flaw in LibreNMS (v26.1.1 and earlier) that could be exploited by attackers, with a reference to the CVE record for further detail.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | librenms | librenms | - | - | - |