nagios4: Nagios Core before 4.5.12 contains a cross-site request forgery vulnerability in cmd.cgi where the CSRF protection me...
CVE-2026-48548 is fixed in nagios4 on 1 platform, first by DEBIAN-CVE-2026-48548, released August 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Nagios Core before 4.5.12 contains a cross-site request forgery vulnerability in cmd.cgi where the CSRF protection mechanism passes validation when the NagFormId cookie is absent. Attackers can craft a malicious cross-site POST request to execute arbitrary Nagios commands as a currently authenticated user without their knowledge or consent.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| nagios4 · Debian 12.15 (bookworm) | 4.4.6-4+deb12u1 | DEBIAN-CVE-2026-48548 | Aug 28, 2026 |
| nagios4 · Debian 13.5 (trixie) | 4.4.6-4.1+deb13u1 | DEBIAN-CVE-2026-48548 | Aug 28, 2026 |
| nagios4 · Debian 14 | 4.5.12+ds-1 | DEBIAN-CVE-2026-48548 | Aug 28, 2026 |
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