CVE-2026-92393: Vulnerability in Apache Software Foundation Apache YuniKorn
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.
CVSS v4.0
Score 2.0low
Affected software
Apache Software Foundation
Apache YuniKorn
pkg:github/github.com/apache/yunikorn-k8shimRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Apache YuniKorn prior to version 1.10.0 does not enforce label and user annotation checks during workload UPDATE actions for Kubernetes objects such as deployments, replicasets, statefulsets, daemonsets, jobs, and cronjobs. This flaw allows any user to bypass these checks, specify arbitrary user info annotations, and change the application ID of a workload. Exploiting this can lead to unauthorized access to queues and manipulation of quota usage and user quota tracking. The CREATE action is not affected as it correctly enforces these checks. The issue is fixed in Apache YuniKorn version 1.10.0.
Potential Impact
Users can bypass workload update checks to specify arbitrary user annotations and change application IDs, potentially gaining unauthorized access to queues and affecting quota usage and enforcement. This could lead to quota mismanagement and unauthorized resource usage. The vulnerability has a low CVSS score of 2. No known exploits are reported in the wild.
Mitigation Recommendations
Users are advised to upgrade Apache YuniKorn to version 1.10.0 or later, where this vulnerability is fixed. No other mitigations are specified.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- apache
- Date Reserved
- 2026-09-16T08:16:04.845Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ac612062cdf04f65633b1ef
Added to database: 10/07/2026, 09:33:58 UTC
Last enriched: 10/07/2026, 09:48:21 UTC
Last updated: 10/07/2026, 21:56:08 UTC
Views: 17
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