What is CVE-2026-48550?

CVE-2026-48550 is a medium-severity vulnerability in Nagios Enterprises, Llc. Core, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-12.

How severe is CVE-2026-48550?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Nagios Enterprises, Llc. Core

CVE-2026-48550

Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to reflected cross-site scripting in cmd.cgi via the NagFormId parameter. An unauthenticated remote attacker can craft a malicious link that, when followed by an authen…

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Nagios Enterprises, Llc. Core — versions 0
Nagios Enterprises, Llc. Xi — versions 0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

disclosure@vulncheck.com (vendor-advisory, patch)
disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-48550?: CVE-2026-48550 is a medium-severity vulnerability in Nagios Enterprises, Llc. Core, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-08-12.
How severe is CVE-2026-48550?: Medium severity. CVSS v3 base score is 6.1 out of 10.