CVE-2026-97146 Apache YuniKorn: Admission control bypass via system label forgery
Attackers can bypass admission control checks by forging system labels, allowing unauthorized queue access and quota enforcement evasion 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-2026-97146?
CVE-2026-97146 is a medium-severity authentication bypass 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 allows bypassing the check for the user annotation by setting a secondary label on the pod. If the pod has the label 'app=yunikorn' the checks limiting the user annotation content are not run. The label is used to identify the YuniKorn application itself in the deployments.
The bypass allows any user to specify an arbitrary user info annotation. The arbitrary user information 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-290
Which versions are affected by CVE-2026-97146?
How do I fix CVE-2026-97146?
No fix has been published for CVE-2026-97146 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-97146 being exploited?
There is no known exploitation of CVE-2026-97146 in the wild and no public exploit code.
Sources
Also known as GHSA-vgg9-3qc4-wv7m.