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CVE-2026-109355— LibreNMS before 26.9.0 Stored XSS via Tools Oxidized Node List

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 在版本 26.9.0 之前存在一个存储型跨站脚本（XSS）漏洞，位于 函数中，该漏洞导致 Oxidized API 字段和 SNMP sysName 未被正确转义。控制 Oxidized 响应或设备 SNMP sysName 的攻击者可以注入恶意脚本，当用户访问“工具 Oxidized”页面时，这些脚本将在其浏览器中执行。

CVSS 6.1 · Medium EPSS 0.19% · P8

Affected Version Matrix 2

VendorProduct Version RangeStatus
librenms librenms < 26.9.0 affected
26.9.0 unaffected
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I. Basic Information for CVE-2026-109355

Vulnerability Information
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Vulnerability Title
LibreNMS before 26.9.0 Stored XSS via Tools Oxidized Node List
Source: CVE Program / CVE List V5
Vulnerability Description
LibreNMS before 26.9.0 contains a stored cross-site scripting vulnerability in get_oxidized_nodes_list() that renders Oxidized API fields and SNMP sysName unescaped. Attackers controlling the Oxidized response or a device's SNMP sysName can inject script that executes in browsers of users viewing the Tools Oxidized page.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
librenms librenms 0 ~ 26.9.0 -

II. Public POCs for CVE-2026-109355

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III. Intelligence Information for CVE-2026-109355

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Vendor Advisories for CVE-2026-109355 (2)

Same Patch Batch · librenms · 2026-10-12 · 6 CVEs total

CVE-2026-109357 8.1 HIGH LibreNMS before 26.9.0 LDAP Filter Injection Authentication Bypass via Authorization Heade
CVE-2026-109353 7.1 HIGH LibreNMS before 26.9.0 SQL Injection via notification_id in notifications.inc.php
CVE-2026-109352 6.1 MEDIUM LibreNMS before 26.9.0 Stored XSS via wireless sensor description
CVE-2026-109356 4.3 MEDIUM LibreNMS before 26.9.0 Missing Authorization in Port Purge via PortsController
CVE-2026-109354 4.3 MEDIUM LibreNMS before 26.9.0 Path Traversal via NFSen channel Parameter

IV. Related Vulnerabilities

Same product: librenms
Same vendor: librenms
Same weakness: CWE-79

V. Comments for CVE-2026-109355

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