A flaw was found in the OpenShift Pipelines operator. The tekton-scheduler-rolebinding ClusterRoleBinding grants the system:authenticated group write access to Kueue and cert-manager custom resources via the tekton-scheduler-role ClusterRole. When Kueue or cert-manager CRDs are present on the cluster, any authenticated user can disrupt workload scheduling, tamper with scheduling priorities, delete other tenants' Workload objects, or induce cert-manager to overwrite TLS Secrets including the default ingress controller certificate.

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Fixes

Solution

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Workaround

If the Tekton Scheduler feature is not in use, administrators can mitigate this by patching the ClusterRoleBinding to reference a specific ServiceAccount instead of system:authenticated: oc patch clusterrolebinding tekton-scheduler-rolebinding --type=merge -p '{"subjects": [{"kind": "ServiceAccount", "name": "openshift-pipelines-operator", "namespace": "openshift-operators"}]}' IMPORTANT: The OpenShift Pipelines operator's reconciliation loop may revert this manual patch. Verify that the operator does not reconcile this binding back to system:authenticated after applying the mitigation. If it does, scale down the operator deployment or configure the operator to skip reconciliation of this object. Alternatively, the ClusterRoleBinding can be deleted if the Tekton Scheduler is not enabled.

History

Thu, 04 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 04 Jun 2026 12:15:00 +0000

Type Values Removed Values Added
Description A flaw was found in the OpenShift Pipelines operator. The tekton-scheduler-rolebinding ClusterRoleBinding grants the system:authenticated group write access to Kueue and cert-manager custom resources via the tekton-scheduler-role ClusterRole. When Kueue or cert-manager CRDs are present on the cluster, any authenticated user can disrupt workload scheduling, tamper with scheduling priorities, delete other tenants' Workload objects, or induce cert-manager to overwrite TLS Secrets including the default ingress controller certificate.
Title Openshift-pipelines-operator-rh: openshift-pipelines-operator: tekton-scheduler-rolebinding grants system:authenticated write access to kueue and cert-manager resources
First Time appeared Redhat
Redhat openshift Builds
Redhat openshift Pipelines
Weaknesses CWE-732
CPEs cpe:/a:redhat:openshift_builds:1
cpe:/a:redhat:openshift_pipelines:1
Vendors & Products Redhat
Redhat openshift Builds
Redhat openshift Pipelines
References
Metrics cvssV3_1

{'score': 9.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published:

Updated: 2026-06-04T15:49:47.332Z

Reserved: 2026-06-04T11:29:18.169Z

Link: CVE-2026-10840

cve-icon Vulnrichment

Updated: 2026-06-04T13:12:02.813Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-06-04T12:16:24.813

Modified: 2026-06-04T15:35:18.623

Link: CVE-2026-10840

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-04T13:30:06Z

Weaknesses