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.
Metrics
Affected Vendors & Products
References
| Link | Providers |
|---|---|
| https://checkmk.com/werk/19735 |
|
History
Sat, 05 Sep 2026 22:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
Fri, 04 Sep 2026 08:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Agent receiver certificate confusion allows authentication with a certificate issued for another endpoint | |
| First Time appeared |
Checkmk
Checkmk checkmk |
|
| Weaknesses | CWE-295 | |
| CPEs | cpe:2.3:a:checkmk:checkmk:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Checkmk
Checkmk checkmk |
|
| References |
| |
| Metrics |
cvssV4_0
|
Status: PUBLISHED
Assigner: Checkmk
Published: 2026-09-04T08:24:49.802Z
Updated: 2026-09-04T19:39:28.278Z
Reserved: 2026-07-16T08:40:57.255Z
Link: CVE-2026-15937
Updated: 2026-09-04T19:39:23.166Z
Status : Deferred
Published: 2026-09-04T09:17:10.410
Modified: 2026-09-08T14:10:24.113
Link: CVE-2026-15937
No data.