EIP-2026-109826

PRE-CVE

Nagios XI 5.7.3 - 'Contact Templates' Persistent Cross-Site Scripting

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-109826. PoCs published by Matthew Aberegg.

AI-analyzed exploit summary This exploit demonstrates a persistent XSS vulnerability in Nagios XI 5.7.3 via the 'Contact Templates' functionality. The payload is injected into the 'tfName' parameter, triggering when the 'Relationships' section is accessed.

Description

Nagios XI 5.7.3 - 'Contact Templates' Persistent Cross-Site Scripting

Exploits (1)

exploitdb WORKING POC
by Matthew Aberegg · textwebappsphp
https://www.exploit-db.com/exploits/48893

This exploit demonstrates a persistent XSS vulnerability in Nagios XI 5.7.3 via the 'Contact Templates' functionality. The payload is injected into the 'tfName' parameter, triggering when the 'Relationships' section is accessed.

Classification
Working Poc 95%
Attack Type
Xss
Complexity
Trivial
Reliability
Reliable
Target: Nagios XI 5.7.3
Auth required
Prerequisites: Valid session cookie (authentication) · Access to the Core Config Manager
MITRE ATT&CK
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026