EUVD-2026-84350

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...

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 Livestatus query headers, bypassing object visibility restrictions in count queries to infer information about hosts and services...

CVE-2026-92882 Redact SNMP community, SNMPv3 pass phrases, and IPMI password in host config REST API GET responses

Insufficiently protected credentials in the host and folder configuration endpoints of the REST API in Checkmk 2.5.0p15, 2.4.0p38, 2.3.0p51 and 2.2.0 EOL allows an authenticated user who may view a host's configuration to read stored SNMP community strings, SNMPv3 auth and privacy pass phrases an...

CVE-2026-92882

Checkmk versions <2.5.0p15, <2.4.0p37,

EUVD-2026-84349

Insufficiently protected credentials in the host and folder configuration endpoints of the REST API in Checkmk 2.5.0p15, 2.4.0p37, 2.3.0p51 and 2.2.0 EOL allows an authenticated user who may view a host's configuration to read stored SNMP community strings, SNMPv3 auth and privacy pass phrases an...

CVE-2026-92882 Redact SNMP community, SNMPv3 pass phrases, and IPMI password in host config REST API GET responses

Insufficiently protected credentials in the host and folder configuration endpoints of the REST API in Checkmk 2.5.0p15, 2.4.0p38, 2.3.0p51 and 2.2.0 EOL allows an authenticated user who may view a host's configuration to read stored SNMP community strings, SNMPv3 auth and privacy pass phrases an...

PT-2026-96699

Name of the Vulnerable Software and Affected Versions Checkmk versions prior to 2.5.0p14 Description Improper neutralization of newlines in filter values within the monitoring host and service list APIs allows an authenticated user to inject additional Livestatus query headers. This can lead to t...

PT-2026-96700

Name of the Vulnerable Software and Affected Versions Checkmk versions prior to 2.5.0p15 Checkmk versions prior to 2.4.0p37 Checkmk versions prior to 2.3.0p51 Checkmk version 2.2.0 Description Insufficiently protected credentials in the host and folder configuration endpoints of the REST API allo...

CVE-2026-92882: Insufficiently Protected Credentials

Insufficiently protected credentials in the host and folder configuration endpoints of the REST API in Checkmk 2.5.0p15, 2.4.0p38, 2.3.0p51 and 2.2.0 EOL allows an authenticated user who may view a host's configuration to read stored SNMP community strings, SNMPv3 auth and privacy pass phrases an...

CVE-2026-90990: Improper Neutralization of CRLF Sequences

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...

CVE-2026-77021

Improper handling of highly compressed data data amplification in Checkmk 2.5.0p14, 2.4.0p37, 2.3.0p51 and 2.2.0 EOL allows an attacker who controls a host registered for push mode to exhaust the memory of the agent receiver by sending a small zlib compressed payload that decompresses to an...

EUVD-2026-83883

Improper handling of highly compressed data data amplification in Checkmk 2.5.0p14, 2.4.0p37, 2.3.0p51 and 2.2.0 EOL allows an attacker who controls a host registered for push mode to exhaust the memory of the agent receiver by sending a small zlib compressed payload that decompresses to an...

CVE-2026-77021 Missing decompression size limit in agent receiver allows memory exhaustion via push agent data

Improper handling of highly compressed data data amplification in Checkmk 2.5.0p14, 2.4.0p37, 2.3.0p51 and 2.2.0 EOL allows an attacker who controls a host registered for push mode to exhaust the memory of the agent receiver by sending a small zlib compressed payload that decompresses to an...

CVE-2026-77021 Missing decompression size limit in agent receiver allows memory exhaustion via push agent data

Improper handling of highly compressed data data amplification in Checkmk 2.5.0p14, 2.4.0p37, 2.3.0p51 and 2.2.0 EOL allows an attacker who controls a host registered for push mode to exhaust the memory of the agent receiver by sending a small zlib compressed payload that decompresses to an...

CVE-2026-77021

Checkmk versions prior to 2.5.0p14 , 2.4.0p37 , and 2.3.0p51 , as well as the EOL 2.2.0 release, are affected by a data amplification vulnerability in the agent receiver. The root cause is a missing decompression size limit on zlib-compressed data sent by hosts registered in push mode. An attacke...

PT-2026-96071

Name of the Vulnerable Software and Affected Versions Checkmk versions prior to 2.5.0p14 Checkmk versions prior to 2.4.0p37 Checkmk versions prior to 2.3.0p51 Checkmk version 2.2.0 Description Improper handling of highly compressed data, known as data amplification, allows an attacker controlling...

CVE-2026-77021: Improper Handling of Highly Compressed Data (Data Amplification)

Improper handling of highly compressed data data amplification in Checkmk 2.5.0p14, 2.4.0p37, 2.3.0p51 and 2.2.0 EOL allows an attacker who controls a host registered for push mode to exhaust the memory of the agent receiver by sending a small zlib compressed payload that decompresses to an...

HTB-NanoCorp-CVE-2024-0670

CVE-2024-0670 - Escalada de Privilegios en la Reparación MSI del Agente CheckMK NanoCorp HTB Este repositorio contiene un script de PowerShell utilizado para explotar CVE-2024-0670 en la máquina NanoCorp de Hack The Box. La vulnerabilidad permite a un usuario con pocos privilegios abusar de la...

CVE-2026-15937

Improper certificate validation in Checkmk 2.5.0p10 allows a relay and a push agent that share the same UUID to reuse each other's mTLS certificate to authenticate against agent receiver endpoints in either direction, because the endpoints do not verify that the certificate was issued by their ow...

CVE-2026-15937 Agent receiver certificate confusion allows authentication with a certificate issued for another endpoint

Improper certificate validation in Checkmk 2.5.0p10 allows a relay and a push agent that share the same UUID to reuse each other's mTLS certificate to authenticate against agent receiver endpoints in either direction, because the endpoints do not verify that the certificate was issued by their ow...