CVE-2026-90990 — Livestatus injection via monitoring filter values
Improper neutralization of newlines in filter values in the monitoring host and service list APIs in Checkmk <2.5.0p14 allows an authenticated user to inject additional Livestat…
Published: 2026-09-22 · CVSS: 5.3 · CVSS 4.0
Improper neutralization of newlines in filter values in the monitoring host and service list APIs in Checkmk <2.5.0p14 allows an authenticated user to inject additional Livestatus query headers, bypassing object visibility restrictions in count queries to infer information about hosts and services outside their contact groups and occupying web server and Livestatus workers for an attacker-controlled duration.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7