CVE-2026-6383: Red Hat OpenShift Virtualization 4 · Incorrect Authorization
Affects Red Hat OpenShift Virtualization 4Source CVE Database V5
Not known to be exploited · CVSS 5.4 Medium.
Data as of 30 Oct 2026, 06:59 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:NExploitation evidence
Disclosed: evidence found.
CVE published 15 Apr 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Red Hatredhat/openshift-virtualizationpkg:rpm/redhat/openshift-virtualizationOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Until an official fix is released, review and restrict custom RBAC roles to minimize exposure to this issue. Avoid granting overly broad permissions on subresources and monitor for any unusual access patterns related to subresource operations.
Description
CVE-2026-6383 is a medium-severity vulnerability in Red Hat OpenShift Virtualization 4 caused by incorrect authorization in KubeVirt's RBAC evaluation logic. The flaw arises from improper truncation of subresource names during permission checks, which can lead to authenticated users with certain custom roles gaining unauthorized access to subresources. This may result in unauthorized disclosure of sensitive information or unauthorized actions. Conversely, some legitimate users might be incorrectly denied access to resources. No official patch or remediation level has been confirmed yet according to the vendor advisory.