CVE-2026-92393 Apache YuniKorn: Admission control bypass via workload UPDATE operation
Attackers can bypass admission control checks during workload updates to access unauthorized queues and evade quota enforcement in Apache YuniKorn.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-92393?
CVE-2026-92393 is a low-severity missing authorization vulnerability in Apache YuniKorn, published on 7 Oct 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-863
Which versions are affected by CVE-2026-92393?
How do I fix CVE-2026-92393?
No fix has been published for CVE-2026-92393 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-92393 being exploited?
There is no known exploitation of CVE-2026-92393 in the wild and no public exploit code.
Sources
Also known as GHSA-q2pg-9xr3-7r4g.