nagios4: Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 are vulnerable to authenticated remote code execution via cus...
CVE-2026-48553 is fixed in nagios4 on 1 platform, first by DEBIAN-CVE-2026-48553, released August 12, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Nagios Core before 4.5.13 and Nagios XI before 2026R1.5 are vulnerable to authenticated remote code execution via custom-variable macro injection through the Nagios Remote Data Processor (NRDP). When a custom variable defined on a host, service, or contact is referenced in a shell-executed command line, an authenticated attacker with NRDP access can inject OS commands through the macro value. Exploitation requires a non-default configuration in which a custom variable is defined and referenced in a shell-executed command.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| nagios4 · Debian 12.15 (bookworm) | 4.4.6-4+deb12u2 | DEBIAN-CVE-2026-48553 | Aug 12, 2026 |
| nagios4 · Debian 13.5 (trixie) | 4.4.6-4.1+deb13u2 | DEBIAN-CVE-2026-48553 | Aug 12, 2026 |
| nagios4 · Debian 14 | 4.5.14+ds-1 | DEBIAN-CVE-2026-48553 | Aug 12, 2026 |
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