CVE-2025-14243: A flaw was found in the OpenShift Mirror Registry

Routine

MEDIUM 5.3REMOTEWATCHLISTDOWNGRADE

CVE-2025-14243 is a medium-severity flaw (CVSS 5.3) affecting mirror registry for red hat openshift. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Remotely exploitable, no login, no user action
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 79%)
CISA exploited list	No
Weakness	CWE-209
Published	2026-04-08
Last modified	2026-07-25

Publisher (CNA): Red Hat, Inc. · Vendor: redhat

Last updated 2026-07-25 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-08 17:20 UTCPublished CVE record published
2026-07-25 10:10 UTCUpdated Record last modified

redhat mirror registry for red hat openshift DOWNGRADE

Affected: all versions · 2.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.0

1. Check installed version

apt-cache policy mirror-registry-for-red-hat-openshift || rpm -q mirror-registry-for-red-hat-openshift || mirror-registry-for-red-hat-openshift --version

2. No fixed release: DOWNGRADE to a release before 2.0 (Debian / Ubuntu)

apt-cache madison mirror-registry-for-red-hat-openshift sudo apt install mirror-registry-for-red-hat-openshift=<VERSION_BEFORE_2.0> sudo apt-mark hold mirror-registry-for-red-hat-openshift

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list mirror-registry-for-red-hat-openshift sudo dnf downgrade mirror-registry-for-red-hat-openshift-<VERSION_BEFORE_2.0> sudo dnf versionlock add mirror-registry-for-red-hat-openshift

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2025-14243?

mirror registry for red hat openshift: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2025-14243 being exploited?

CVE-2025-14243 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2025-14243 affect?

CVE-2025-14243 affects mirror registry for red hat openshift. Severity is medium (CVSS 5.3). 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 creati

How urgent is CVE-2025-14243?

Priority 34/100. Remotely exploitable, no login, no user action; On your watchlist

Software pages

Red Hat OpenShift vulnerabilities

Related CVEs

CVE-2026-32591 MEDIUM 5.2 DOWNGRADE DOWNGRADE A flaw was found in Red Hat Quay's Proxy Cache configuration feature
CVE-2026-32589 HIGH 7.4 DOWNGRADE DOWNGRADE A flaw was found in Red Hat Quay's container image upload process
CVE-2026-2377 MEDIUM 6.5 DOWNGRADE DOWNGRADE A flaw was found in Red Hat Quay and mirror registry for Red Hat OpenShift
CVE-2026-32590 HIGH 7.1 DOWNGRADE DOWNGRADE A flaw was found in Red Hat Quay's handling of resumable container image layer uploads

References

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