CVE-2026-26988
LibreNMS: SQL Injection in ajax_table.php spreads through a covert data stream
Description
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.
INFO
Published Date :
Feb. 20, 2026, 2:16 a.m.
Last Modified :
Feb. 20, 2026, 4:31 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update LibreNMS to version 26.2.0 or later.
- Verify the application no longer concatenates user input into SQL queries.
Public PoC/Exploit Available at Github
CVE-2026-26988 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-26988.
| URL | Resource |
|---|---|
| https://github.com/librenms/librenms/commit/15429580baba03ed1dd377bada1bde4b7a1175a1 | Patch |
| https://github.com/librenms/librenms/pull/18777 | Issue Tracking |
| https://github.com/librenms/librenms/security/advisories/GHSA-h3rv-q4rq-pqcv | Exploit Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-26988 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-26988
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
None
Python
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-26988 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-26988 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Feb. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Added CPE Configuration OR *cpe:2.3:a:librenms:librenms:*:*:*:*:*:*:*:* versions up to (excluding) 26.2.0 Added Reference Type GitHub, Inc.: https://github.com/librenms/librenms/commit/15429580baba03ed1dd377bada1bde4b7a1175a1 Types: Patch Added Reference Type GitHub, Inc.: https://github.com/librenms/librenms/pull/18777 Types: Issue Tracking Added Reference Type GitHub, Inc.: https://github.com/librenms/librenms/security/advisories/GHSA-h3rv-q4rq-pqcv Types: Exploit, Third Party Advisory -
New CVE Received by [email protected]
Feb. 20, 2026
Action Type Old Value New Value Added Description 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CWE CWE-89 Added Reference https://github.com/librenms/librenms/commit/15429580baba03ed1dd377bada1bde4b7a1175a1 Added Reference https://github.com/librenms/librenms/pull/18777 Added Reference https://github.com/librenms/librenms/security/advisories/GHSA-h3rv-q4rq-pqcv