CVE-2026-26990

Published: Feb 20, 2026Modified: Feb 20, 2026

8.8

Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: security-advisories@github.com (Secondary)

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 (1)

Products: Librenms: Librenms

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Librenms Librenms	Before 26.2.0

Related CWEs

Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.

References (3)

https://github.com/librenms/librenms/commit/15429580baba03ed1dd377bada1bde4b7a1175a1

Source: security-advisories@github.com

Patch

https://github.com/librenms/librenms/pull/18777

Source: security-advisories@github.com

Issue Tracking

https://github.com/librenms/librenms/security/advisories/GHSA-79q9-wc6p-cf92

Source: security-advisories@github.com

ExploitThird Party Advisory

Timeline

No history available yet.