SQL Injection in Librenms
CVE-2026-26988
LibreNMS is an auto-discovering PHP/MySQL/SNMP based network monitoring tool. Versions 25.12.0 and below contain an SQL Injection vulnerability in the ajax_table.php endpoint. The application fails to properly sanitize or parameterize user input when processing IPv6 address searches. Specifically, the address parameter is split into an address and a prefix, and the prefix portion is directly concatenated into the SQL query string without validation. This allows an attacker to inject arbitrary SQL commands, potentially leading to unauthorized data access or database manipulation. This issue has been fixed in version 26.2.0.
Vulnerability class: SQL Injection
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
EPSS exploit prediction
EPSS: 0.005 (38.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.074 · newest: 0.005 · change: -0.070
Affected products
- Librenms — versions < 26.2.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/librenms/librenms/security/advisories/GHSA-h3rv-q4rq-pqcv (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-2026-26988?
- CVE-2026-26988 is a critical-severity vulnerability in Librenms, classified under SQL Injection. CVSS score: 9.1/10. Published 2026-02-20.
- How severe is CVE-2026-26988?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2026-26988 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.