---
cve: "CVE-2026-84189"
severity: "CRITICAL"
cvss: 9.2
epss: "0.3%"
vendor: "librenms"
kev: false
exploited: false
published: "2026-09-01 12:17:48"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-20T16:57:57+02:00"
---

# CVE-2026-84189

> 9.2 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Hoch | good |

## Patch verfügbar (OSV)

- bbd78db5510d671cc9d303f24a966b33d4ecb2d8 (Commit)

## Referenzen

- <https://github.com/librenms/librenms/security/advisories/GHSA-7gww-x7fh-jf9j>
- <https://www.vulncheck.com/advisories/librenms-before-26.7.0-stored-xss-via-oxidized-api>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-84189) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_