Auth bypass in Red Hat Logging Subsystem For Openshift
CVE-2026-16242
A flaw was found in the Konnectivity proxy-server configuration for hosted control planes. The agent-facing listener was started without --cluster-ca-cert (and without token-based agent authentication), so client certificates were not validated. A remote attacker who can reach the Konnectivity cluster endpoint could connect as an unauthenticated agent, join the routing pool, and potentially proxy, inspect, modify, or drop control-plane-to-node traffic.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.4 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L.
EPSS exploit prediction
EPSS: 0.009 (59.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 59.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.008 · newest: 0.009 · change: +0.001
Affected products
- Red Hat Logging Subsystem For Openshift
- Red Hat Multicluster Engine For Kubernetes
- Red Hat Multicluster Engine For Kubernetes 2.1 — versions 1784905766
- Red Hat Multicluster Engine For Kubernetes 2.10 — versions 1784905766
- Red Hat Multicluster Engine For Kubernetes 2.11 — versions 1784945966
- Red Hat Multicluster Engine For Kubernetes 2.11.0 — versions 1784945966
- Red Hat Multicluster Engine For Kubernetes 2.17 — versions 1784856942
- Red Hat Multicluster Engine For Kubernetes 2.6 — versions 1784905804
- Red Hat Multicluster Engine For Kubernetes 2.8 — versions 1784905783
- Red Hat Multicluster Engine For Kubernetes 2.9 — versions 1784905769
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-16242 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- github.com/openshift/hypershift/pull/9031
- access.redhat.com/errata/RHSA-2026:46885 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:47388 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:47735 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:47953 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:47949 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:47974 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:48284 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-16242?
- CVE-2026-16242 is a critical-severity vulnerability in Red Hat Logging Subsystem For Openshift, classified under Missing Authentication for Critical Function. CVSS score: 9.4/10. Published 2026-07-20.
- How severe is CVE-2026-16242?
- Critical severity. CVSS v3 base score is 9.4 out of 10.