Vulnerability-Lookup

CVE-2026-6383 (GCVE-0-2026-6383)

Vulnerability from cvelistv5 – Published: 2026-04-15 18:22 – Updated: 2026-04-15 18:40

Title

Kubevirt: kubevirt: unauthorized subresource access due to improper rbac evaluation

Summary

A flaw was found in KubeVirt's Role-Based Access Control (RBAC) evaluation logic. The authorization mechanism improperly truncates subresource names, leading to incorrect permission evaluations. This allows authenticated users with specific custom roles to gain unauthorized access to subresources, potentially disclosing sensitive information or performing actions they are not permitted to do. Additionally, legitimate users may be denied access to resources.

Severity

5.4 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-04-15 18:40 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

redhat CNA under the redhat root

CNA scorecard B 82/100 over 1063 records in the last 180 days details

References

2 references

URL	Tags
https://access.redhat.com/security/cve/CVE-2026-6383	vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2458741	issue-trackingx_refsource_REDHAT

Impacted products

1 product

Vendor	Product	Version	CPE status
Red Hat	Red Hat OpenShift Virtualization 4	cpe:/a:redhat:container_native_virtualization:4

Date Public

2026-04-15 18:03

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-6383

Vulnerability from fkie_nvd - Published: 2026-04-15 19:16 - Updated: 2026-10-26 22:10

Severity

5.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Summary

References

	URL	Tags
	secalert@redhat.com	https://access.redhat.com/security/cve/CVE-2026-6383
	secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=2458741

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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  ],
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GHSA-J6CV-3W8P-VRG8

Vulnerability from github – Published: 2026-04-15 21:30 – Updated: 2026-04-16 21:40

Summary

KubeVirt's authorization mechanism improperly truncates subresource names

Details

Severity

5.4 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Show details on source website

JSON

To clipboard

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  "modified": "2026-04-16T21:40:08Z",
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    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "KubeVirt\u0027s authorization mechanism improperly truncates subresource names"
}

MSRC_CVE-2026-6383

Vulnerability from csaf_microsoft - Published: 2026-05-07 01:12 - Updated: 2026-09-25 01:59

Summary

Kubevirt: kubevirt: unauthorized subresource access due to improper rbac evaluation

Scope

1 vulnerability in this advisory, including CVE-2026-6383.

CVE-2026-6383

5.4 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Fixed: 1 product Known affected: 3 products Under investigation: 2 products

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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CVE-2026-6383 (GCVE-0-2026-6383)

FKIE_CVE-2026-6383

GHSA-J6CV-3W8P-VRG8

MSRC_CVE-2026-6383

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