High severity · published Feb 20, 2026
CVE-2026-26990
LibreNMS has Time-Based Blind SQL Injection in address-search.inc.php
8.8
CVSS
4.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)4.5% · higher than 91% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
librenms · librenms
< 26.2.0 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-26990
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-26990
Patch
https://github.com/librenms/librenms/commit/15429580baba03ed1dd377bada1bde4b7a1175a1
Issue Tracking
https://github.com/librenms/librenms/pull/18777
Exploit
https://github.com/librenms/librenms/security/advisories/GHSA-79q9-wc6p-cf92
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