Red Hat OpenShift Container Platform 4.18: Missing Authentication for Critical Functionality
CVE-2026-96577 is a high-severity missing authentication for critical functionality vulnerability in Red Hat OpenShift Container Platform 4.18 from Red Hat, with a CVSS 3.1 base score of 7.1 out of 10. It can be exploited from the same local network by an unauthenticated attacker, without any action from a user. There is no confirmed exploitation so far. EPSS estimates a 0.13% chance of exploitation within 30 days, which is low compared with other CVEs.
High severity with no evidence of exploitation so far.
What to do
- Check which version of Red Hat OpenShift Container Platform 4.18 you run against the affected versions below, and install the vendor's latest release.
Affected products and versions
| Vendor | Product | Affected versions | Fixed in |
|---|---|---|---|
| Red Hat | Red Hat OpenShift Container Platform 4.18 | Not specified in the record | Not stated |
| Red Hat | Red Hat OpenShift Container Platform 4.19 | Not specified in the record | Not stated |
| Red Hat | Red Hat OpenShift Container Platform 4.20 | Not specified in the record | Not stated |
| Red Hat | Red Hat OpenShift Container Platform 4.21 | Not specified in the record | Not stated |
| Red Hat | Red Hat OpenShift Container Platform 4.22 | Not specified in the record | Not stated |
| Red Hat | Assisted Installer for Red Hat OpenShift Container Platform 2 | Not specified in the record | Not stated |
| Red Hat | Red Hat OpenShift Container Platform 5 | Not specified in the record | Not stated |
Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.
How the severity score breaks down
- Attack vector
- AdjacentThe attacker must be on the same local network segment.
- Attack complexity
- LowNo special conditions are needed; the attack works reliably.
- Privileges required
- NoneNo account or login is needed.
- User interaction
- NoneNo action by a victim is required.
- Scope
- UnchangedImpact stays within the vulnerable component.
- Confidentiality
- LowSome restricted data can be read.
- Integrity
- HighData or code can be modified at will.
- Availability
- NoneAvailability is not affected.
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N. Scored by CNA (redhat.com).
Official 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.
Source: the CVE record as published by its numbering authority, via NVD and CVE.org.
The underlying weakness: Missing Authentication for Critical Functionality
The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
How developers prevent this class of flaw
- For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid. For example, consider using libraries with authentication capabilities such as OpenSSL or the ESAPI Authenticator.
- When storing data in the cloud (e.g., S3 buckets, Azure blobs, Google Cloud Storage, etc.), use the provider's controls to require strong authentication for users who should be allowed to access the data.
More Missing Authentication for Critical Functionality vulnerabilities (CWE-306)
Timeline
- CVE record published.
- CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: partial).
- Record last changed materially (score, affected products, status or references).
References
Other references
Other vulnerabilities in Red Hat OpenShift Container Platform 4.18
- 7.4 High severity
- 7.7 High severity
- 7.7 High severity
- 7.5 High severity
- 7.2 High severity
- 7.4 High severity
Recent Missing Authentication for Critical Functionality vulnerabilities
- 7.1 High severity
- 7.1 High severity
- 7.5 High severity
- 8.8 High severity
- 7.5 High severity
- 9.8 Critical severity
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