SQL Injection in Librenms
CVE-2026-26990
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.
Vulnerability class: SQL Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (46.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 47th percentile — 46.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.041 · newest: 0.006 · change: -0.034
Affected products
- Librenms — versions < 26.2.0
Weakness classification (CWE)
References
- github.com/librenms/librenms/security/advisories/GHSA-79q9-wc6p-cf92 (Exploit, Third Party Advisory)
- github.com/librenms/librenms/pull/18777 (Issue Tracking)
- github.com/librenms/librenms/commit/15429580baba03ed1dd377bada1bde4b7a1175a1 (Patch)
Frequently asked questions
- What is CVE-2026-26990?
- CVE-2026-26990 is a high-severity vulnerability in Librenms, classified under SQL Injection. CVSS score: 8.8/10. Published 2026-02-20.
- How severe is CVE-2026-26990?
- High severity. CVSS v3 base score is 8.8 out of 10.