SEPTEMBER 18, 2026
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Case File

CVE-2026-84189

HIGH · CVSS 8.1 EPSS 0.27% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-09-01 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

LibreNMS versions up to 26.4.0 are vulnerable to stored cross-site scripting due to improper handling of JSON fields from an admin-configurable Oxidized integration URL. This flaw allows an attacker to exploit the SSRF vulnerability by pointing the Oxidized URL to a malicious server, potentially compromising all users who access the affected device's showconfig page. Organizations using LibreNMS should prioritize upgrading to version 26.7.0 or later to mitigate this high-severity risk.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-84189
Severity
HIGH
CVSS
8.1
EPSS
0.27%

Original NVD Description

LibreNMS through 26.4.0 renders JSON fields (name, ip, model, author, commit message) returned by the admin-configurable Oxidized integration URL (oxidized.url) into the device showconfig page without applying htmlspecialchars(). An administrator who points the Oxidized URL at an attacker-controlled server (SSRF) can cause it to return malicious JSON, resulting in stored/persistent cross-site scripting affecting all users who view any device's showconfig tab. Fixed in 26.7.0.