Nagios Core<=4.5.14 & XI<2026R1.7 cmd.cgi Reflected XSS via NagFormId
CVE-2026-48550 Published on August 12, 2026
Nagios Core / XI cmd.cgi Reflected XSS via NagFormId Parameter
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 authenticated user, executes arbitrary JavaScript in the victim's browser.
Vulnerability Analysis
CVE-2026-48550 is exploitable with network access. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-48550 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-48550
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Affected Versions
Nagios Enterprises, LLC. Nagios Core:- Before 4.5.14 is affected.
- Before 2026R1.7 is affected.