CVE-2026-109353: LibreNMS before 26.9.0 SQL Injection via notification_id in notifications.inc.php

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-12 · updated 2026-10-15
Weakness: CWE-89

Description

LibreNMS before 26.9.0 contains an SQL injection vulnerability that allows unprivileged users to inject SQL by supplying an array-valued notification_id parameter to notifications.inc.php. Attackers can perform cross-table reads of users.password hashes, with results persisted in notifications_attribs and readable through the interface.

Affected products

librenms: before 26.9.0 — fixed in 26.9.0

How to fix

Upgrade to a fixed version: librenms 26.9.0. Check the vendor advisory for mitigations.

References

https://github.com/librenms/librenms/security/advisories/GHSA-2pw7-8mmj-gcw5
https://www.vulncheck.com/advisories/librenms-before-26.9.0-sql-injection-via-notification-id-in-notifications-inc-php
https://github.com/librenms/librenms/security/advisories/GHSA-2pw7-8mmj-gcw5

Get alerted when CVE-2026-109353 or the next vulnerability affects your stack