CVE-2026-26988

Name: CVE-2026-26988
Creator: NVD / NIST
Published: 2026-02-20T02:16:54.55+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.3/10EPSS 7.44%

Last modified Jun 17, 2026

CVE-2026-26988 is a critical-severity vulnerability rated 9.3/10 on the CVSS scale. 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. EPSS estimates a 7.44% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.1/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CVSS 4.0

9.3/10

CVSS:4.0/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

EPSS Probability

7.44%

93.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-89

Affected Software

Vendor	Product	Versions
Librenms	Librenms	< 26.2.0

References

https://github.com/librenms/librenms/commit/15429580baba03ed1dd377bada1bde4b7a1175a1Patch
https://github.com/librenms/librenms/pull/18777Issue Tracking
https://github.com/librenms/librenms/security/advisories/GHSA-h3rv-q4rq-pqcvExploit, Third Party Advisory

Timeline

Published: Feb 20, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-26988?

How severe is CVE-2026-26988?

CVE-2026-26988 has a CVSS score of 9.3/10 (CRITICAL severity). The EPSS model estimates a 7.44% probability of exploitation in the next 30 days.

How do I fix CVE-2026-26988?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-26988?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST