medium5.3
CVE-2026-90990
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 a…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Checkmk | Checkmk | before 2.5.0p14 |
Versions were read from the advisory text. No structured product data has been published for this record yet.