CVE-2026-15576: Checkmk 2.5.0 to before 2.5.0p10

Affected technology

Checkmk · 2.5.0 to before 2.5.0p10
Checkmk GmbH

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An unauthenticated remote attacker can bypass mutual TLS client certificate verification of relay endpoints by supplying a fixed placeholder identity in the request URL, resulting in limited impact on integrity and availability. Vendor/CNA’s CVSS 4.0 assessment (base score 6.9/10) rates confidentiality impact as none; integrity and availability impact as low.