Apache YuniKorn 1.9.0 and earlier does not implement label and user annotation checks for workload UPDATE action bypassing all checks. Workloads in YuniKorn are defined as the following Kubernetes objects: "deployments", "replicasets", "statefulsets", "daemonsets", "jobs", "cronjobs". The CREATE action correctly enforces the checks for all object types.


The bypass allows any user to specify an arbitrary user info annotation. The same bypass also allows changing the application ID for the workload. The combination of the two applied in one UPDATE could allow access to a queue that the user normally would not have access to. Quota usage for the queue might be impacted if the application runs in the incorrect queue. User based quota enforcement is also based on the user annotation. User quota tracking could be side stepped even if the application runs in the correct queue.




Users are recommended to upgrade to version 1.10.0, which fixes this issue.
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History

Wed, 07 Oct 2026 10:30:00 +0000

Type Values Removed Values Added
References

Wed, 07 Oct 2026 09:30:00 +0000

Type Values Removed Values Added
Description Apache YuniKorn 1.9.0 and earlier does not implement label and user annotation checks for workload UPDATE action bypassing all checks. Workloads in YuniKorn are defined as the following Kubernetes objects: "deployments", "replicasets", "statefulsets", "daemonsets", "jobs", "cronjobs". The CREATE action correctly enforces the checks for all object types. The bypass allows any user to specify an arbitrary user info annotation. The same bypass also allows changing the application ID for the workload. The combination of the two applied in one UPDATE could allow access to a queue that the user normally would not have access to. Quota usage for the queue might be impacted if the application runs in the incorrect queue. User based quota enforcement is also based on the user annotation. User quota tracking could be side stepped even if the application runs in the correct queue. Users are recommended to upgrade to version 1.10.0, which fixes this issue.
Title Apache YuniKorn: Admission control bypass via workload UPDATE operation
References
Metrics cvssV4_0

{'score': 2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-10-07T09:16:13.149Z

Reserved: 2026-09-16T08:16:04.845Z

Link: CVE-2026-92393

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-10-07T10:17:42.247

Modified: 2026-10-07T10:17:42.247

Link: CVE-2026-92393

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses

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