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CVE-2026-15576 Agent receiver accepts mTLS requests without a client certificate

🗓️ 21 Aug 2026 11:10:00Reported by CheckmkType 
cvelist
 cvelist
🔗 www.cve.org👁 8 Views

mTLS client cert bypass in Checkmk <2.5.0p10 agent receiver via placeholder identity in URL.

Related
Affected
Refs
ReporterTitlePublishedViews
Family
cve
CVE
CVE-2026-15576
21 Aug 202611:10
cve
euvd
EUVD
EUVD-2026-63903
21 Aug 202612:30
euvd
nvd
NVD
CVE-2026-15576
21 Aug 202611:17
nvd
vulnrichment
Vulnrichment
CVE-2026-15576 Agent receiver accepts mTLS requests without a client certificate
21 Aug 202611:10
vulnrichment
[
  {
    "defaultStatus": "unaffected",
    "product": "Checkmk",
    "vendor": "Checkmk GmbH",
    "versions": [
      {
        "lessThan": "2.5.0p10",
        "status": "affected",
        "version": "2.5.0",
        "versionType": "semver"
      }
    ]
  }
]

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