CVE-2026-96577: Oc-mirror__release-4.21: embedded local cache registry listens on all interfaces without authentication, with delete enabled

Severity: high (CVSS 7.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-01 · updated 2026-10-15
Weakness: CWE-306

Description

A flaw was found in oc-mirror. During mirroring operations, the embedded local cache registry binds to all network interfaces without authentication or encryption instead of restricting access to the local system. An unauthenticated attacker on an adjacent network can connect to the exposed service to push tampered container images, delete cached images, or access mirrored content.

Affected products

Red Hat OpenShift Container Platform 4.18: all versions — fixed in 1790828598
Red Hat OpenShift Container Platform 4.19: all versions — fixed in 1790778095
Red Hat OpenShift Container Platform 4.20: all versions — fixed in 1790782357
Red Hat OpenShift Container Platform 4.21: all versions — fixed in 1790777129
Red Hat OpenShift Container Platform 4.22: all versions — fixed in 1790775357

How to fix

Upgrade to a fixed version: Red Hat OpenShift Container Platform 4.18 1790828598; Red Hat OpenShift Container Platform 4.19 1790778095; Red Hat OpenShift Container Platform 4.20 1790782357; Red Hat OpenShift Container Platform 4.21 1790777129; Red Hat OpenShift Container Platform 4.22 1790775357. Check the vendor advisory for mitigations.

References

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