CVE-2025-14243 Mirror-registry: openshift mirror registry: user enumeration via authentication error messages
Unauthenticated attackers can enumerate valid usernames and emails via distinct authentication error messages in the OpenShift Mirror Registry.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-14243?
CVE-2025-14243 is a medium-severity vulnerability in mirror registry for Red Hat OpenShift, published on 8 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw was found in the OpenShift Mirror Registry. This vulnerability allows an unauthenticated, remote attacker to enumerate valid usernames and email addresses via different error messages during authentication failures and account creation.
Weakness: CWE-209
Which versions are affected by CVE-2025-14243?
It affects 1 product.
Products include Redhat Mirror Registry for Red Hat Openshift.
How do I fix CVE-2025-14243?
No fix has been published for CVE-2025-14243 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-14243 being exploited?
There is no known exploitation of CVE-2025-14243 in the wild and no public exploit code.
Other vulnerabilities in mirror registry for Red Hat OpenShift
- CVE-2026-32589 Mirror-registry: quay: insecure direct object reference in blobupload
- CVE-2026-32590 Mirror-registry: remote code execution using pickle deserialization
- CVE-2026-2377 Mirror-registry: quay: quay: server-side request forgery via log export functionality
- CVE-2026-32591 Mirror-registry: quay: server-side request forgery in proxy cache upstream registry configuration
Sources
Also known as GHSA-v9gq-365f-qxxw.