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

CVE-2026-15937

Agent receiver certificate confusion allows authentication with a certificate issued for another endpoint PUBLISHED

Description (CNA)

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 own root certificate.

Affected (CNA)

Vendor / product	Versions
Checkmk GmbH / Checkmk	affected 2.5.0 before 2.5.0p10

CWE

CWE-295

References

https://checkmk.com/werk/19735

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.