What is CVE-2026-48551?

CVE-2026-48551 is a high-severity vulnerability in Nagios Enterprises, Llc. Core, classified under Cross-Site Request Forgery (CSRF). CVSS score: 7.4/10. Published 2026-08-12.

How severe is CVE-2026-48551?

High severity. CVSS v3 base score is 7.4 out of 10.

CSRF in Nagios Enterprises, Llc. Core

CVE-2026-48551

Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 contain a cross-site request forgery protection bypass via a self-supplied double-submit cookie. An attacker can supply matching cookie and request parameter values to bypass CSRF pro…

Vulnerability class: CSRF (Cross-Site Request Forgery)

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N.

Affected products

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

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

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

Frequently asked questions

What is CVE-2026-48551?: CVE-2026-48551 is a high-severity vulnerability in Nagios Enterprises, Llc. Core, classified under Cross-Site Request Forgery (CSRF). CVSS score: 7.4/10. Published 2026-08-12.
How severe is CVE-2026-48551?: High severity. CVSS v3 base score is 7.4 out of 10.