What’s Vulnerable › Vulnerabilities

CVE-2026-26990: LibreNMS has Time-Based Blind SQL Injection in address-search.inc.php

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-02-20 · updated 2026-06-17
• Weakness: CWE-89

Description

LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below have a Time-Based Blind SQL Injection vulnerability in address-search.inc.php via the address parameter. When a crafted subnet prefix is supplied, the prefix value is concatenated directly into an SQL query without proper parameter binding, allowing an attacker to manipulate query logic and infer database information through time-based conditional responses. This vulnerability requires authentication and is exploitable by any authenticated user. This issue has been fixedd in version 26.2.0.

Affected products

• librenms: before 26.2.0 — fixed in 26.2.0

How to fix

Upgrade to a fixed version: librenms 26.2.0. Check the vendor advisory for mitigations.

References

• https://github.com/librenms/librenms/commit/15429580baba03ed1dd377bada1bde4b7a1175a1
• https://github.com/librenms/librenms/pull/18777
• https://github.com/librenms/librenms/security/advisories/GHSA-79q9-wc6p-cf92

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