by Kastro
Paper/Archive/CVE-2026-26988

CVE-2026-26988

librenms librenms — LibreNMS: SQL Injection in ajax_table.php spreads through a covert data stream

EPSS 8%CVSS 9.3
critical.is priorityof 100
47
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 95.0.950 × 2019.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
librenms< 26.2.0–CNA

Scores by source

GitHub_M (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refgithub.com/librenms/librenms/security/advisories/GHSA-h3rv-q4rq-pqcvrefgithub.com/librenms/librenms/pull/18777refgithub.com/librenms/librenms/commit/15429580baba03ed1dd377bada1bde4b7a1175a1