https://vulnerability.circl.lu/rss/recent/all/10 Most recent entries from all 2026-10-04T07:53:15.340396+00:00 Vulnerability-Lookup info@circl.lu python-feedgen Contains only the most 10 recent entries. https://vulnerability.circl.lu/vuln/cve-2026-15576 CVE-2026-15576 — Agent receiver accepts mTLS requests without a client certificate 2026-10-04T07:53:15.351529+00:00

Affected: Checkmk GmbH Checkmk

Improper authentication in the agent receiver of Checkmk <2.5.0p10 allows an unauthenticated remote attacker to 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. Only the Cloud, Ultimate and Ultimate MT editions are affected, as other editions do not expose relay endpoints.