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CVE-2026-26990— LibreNMS has Time-Based Blind SQL Injection in address-search.inc.php

Quick assessment

Affected
librenms librenms
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

LibreNMS是LibreNMS社区的一套基于PHP和MySQL的开源网络监控系统。该系统具有自定义警报、自动发现网络环境和自动更新等特点。 LibreNMS 25.12.0及之前版本存在SQL注入漏洞，该漏洞源于address-search.inc.php中address参数处理不当，可能导致基于时间的盲SQL注入攻击。

CVSS 8.8 · High EPSS 0.62% · P48
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I. Basic Information for CVE-2026-26990

Vulnerability Information
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Vulnerability Title
LibreNMS has Time-Based Blind SQL Injection in address-search.inc.php
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
SQL命令中使用的特殊元素转义处理不恰当(SQL注入)
Source: CVE Program / CVE List V5
Vulnerability Title
LibreNMS SQL注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LibreNMS是LibreNMS社区的一套基于PHP和MySQL的开源网络监控系统。该系统具有自定义警报、自动发现网络环境和自动更新等特点。 LibreNMS 25.12.0及之前版本存在SQL注入漏洞，该漏洞源于address-search.inc.php中address参数处理不当，可能导致基于时间的盲SQL注入攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
librenms librenms < 26.2.0 -

II. Public POCs for CVE-2026-26990

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III. Intelligence Information for CVE-2026-26990

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Vendor Advisories for CVE-2026-26990 (1)

Same Patch Batch · librenms · 2026-02-20 · 7 CVEs total

CVE-2026-27016 5.4 MEDIUM LibreNMS has Stored XSS in Custom OID - unit parameter missing strip_tags()
CVE-2026-26989 4.3 MEDIUM LibreNMS has Stored XSS in Alert Rule
CVE-2026-26992 LibreNMS has Stored Cross-Site Scripting via unsanitized /port-groups name
CVE-2026-26991 LibreNMS vulnerable to Stored Cross-site Scripting through unsanitized /device-groups name
CVE-2026-26988 LibreNMS: SQL Injection in ajax_table.php spreads through a covert data stream
CVE-2026-26987 LibreNMS affected by reflected XSS via email field

IV. Related Vulnerabilities

Same product: librenms
Same vendor: librenms
Same weakness: CWE-89

V. Comments for CVE-2026-26990

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