Medium severity6.1NVD Advisory· Published Aug 12, 2026· Updated Aug 12, 2026

CVE-2026-48550

Description

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Nagios/nagioscorellm-create
Range: <4.5.14
Nagios/Nagios XIllm-create
Range: <2026R1.7

Patches

Vulnerability mechanics

References

github.com/NagiosEnterprises/nagioscore/blob/master/Changelognvd
www.nagios.com/security-disclosures/nagios-core/nvd
www.vulncheck.com/advisories/nagios-core-xi-cmd-cgi-reflected-xss-via-nagformid-parameternvd

News mentions

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cvss	0.397
epss	0.000
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000