This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-48551 →

DEBIAN-CVE-2026-48551

Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 contain a cross-site request forgery protection bypass via a self-supplied double-submit cooki...

Original description

The description as published by the source.

Nagios Core before 4.5.14 and Nagios XI before 2026R1.7 contain a cross-site request forgery protection bypass via a self-supplied double-submit cookie. An attacker can supply matching cookie and request parameter values to bypass CSRF protection, enabling unauthenticated attackers to run commands as authorized users via malicious links.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Debian:12 nagios4

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.6-4+deb12u2"}]}]

Debian:13 nagios4

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.6-4.1+deb13u2"}]}]

Debian:14 nagios4

[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.5.14+ds-1"}]}]

References

advisory security-tracker.debian.org