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CVE-2026-17527VulnerabilityPublished Updated

Red Hat Security Advisory: OpenShift Virtualization v4.22 Images

Affects Red HatSource GCVE Database

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Authoritative record:CVE-2026-17527· High 7.7

Not known to be exploited · CVSS 7.7 High.

Data as of 2 Nov 2026, 17:31 UTC

CVSS 3.1 base score
7.7High
How severe the flaw is on the 0–10 CVSS scale.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Jul 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 2 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red HatRed Hat Container Native Virtualization 4.14Affected–Fixed in–
Red HatRed Hat Container Native Virtualization 4.16Affected–Fixed in–
Red HatRed Hat Container Native Virtualization 4.18Affected–Fixed in–
Red HatRed Hat Container Native Virtualization 4.19Affected–Fixed in–
Red HatRed Hat Container Native Virtualization 4.20Affected–Fixed in–
Red HatRed Hat Container Native Virtualization 4.21Affected–Fixed in–

AI-suggested

Until a fix is available, cluster administrators should avoid granting the cdi.kubevirt.io:view ClusterRole or the built-in Kubernetes view role via cluster-wide ClusterRoleBindings. Instead, use namespace-scoped RoleBindings for these permissions. Administrators should audit namespaces to ensure that identities are not granted both view-equivalent access and separate edit/admin access across namespaces, as this combination enables cross-namespace data exfiltration. Follow Red Hat's guidance on applying updates and monitor the vendor advisory for the release of an official fix.

Description

CVE-2026-17527 is a vulnerability in Red Hat OpenShift Virtualization's containerized-data-importer (CDI) component. The aggregated cdi.kubevirt.io:view ClusterRole incorrectly grants create permission on the datavolumes/source subresource, allowing users with this role and write access to any namespace to clone persistent volume claims (PVCs) across namespaces. This bypasses namespace isolation and the intended read-only restrictions of the view role.

References

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