CVE-2026-48554
High · 7.5CVSS
7.5
EPSS
1.0%
Published
Aug 12, 2026
CISA due date
—
The record
Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 are vulnerable to authenticated remote code execution via unfiltered NOTIFICATION-family macro substitution through the com_data parameter. When a notification command references $NOTIFICATIONCOMMENT$ or $NOTIFICATIONAUTHOR$ in a shell-reachable position, authenticated UI users can run arbitrary commands as the nagios user. Exploitation requires a non-default configuration in which a notification command references these macros in a shell-executed command line.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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