CVE-2026-6383Network attack vector

Unauthorized subresource access via truncated authorization paths

Published Apr 15, 2026 · Updated Apr 15, 2026

Incorrect authorization in Red Hat OpenShift Virtualization 4 allows remote authenticated users to access restricted VM subresources. The virt-api addNamespacedResourceAttributes() function takes only pathSplit[8] when building a SubjectAccessReview, so vnc/screenshot is checked as vnc. A custom role permitting a parent subresource but not a deeper one is required; successful requests can read data or invoke only those deeper VM operations.

CVSS severity5.4
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in Red Hat OpenShift Virtualization 4 allows remote authenticated users to access restricted VM subresources. The virt-api addNamespacedResourceAttributes() function takes only pathSplit[8] when building a SubjectAccessReview, so vnc/screenshot is checked as vnc. A custom role permitting a parent subresource but not a deeper one is required; successful requests can read data or invoke only those deeper VM operations.

The record

CVE
CVE-2026-6383
Published
Apr 15, 2026
Updated
Apr 15, 2026
Vendor
389 Directory Server
Product
Red Hat OpenShift Virtualization
Classifications
CWE-863, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

389 Directory Server · Red Hat OpenShift VirtualizationAffected versions are unavailable in this record.

Published CVSS scores

5.4Red HatCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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