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Description

A flaw was found in KubeVirt's virt-handler domain notify server. The gRPC handlers for HandleDomainEvent and HandleK8SEvent derive the VMI identity (namespace/name) solely from the request body without validating it against the connection's origin. Each virt-launcher pod connects through a per-VMI pipe socket, but no identity tag is propagated from the pipe path to the server handlers. This allows a compromised virt-launcher process to send forged domain lifecycle events for any other VMI scheduled on the same node, causing virt-handler to erroneously update that VMI's state and disrupt its lifecycle management.

PUBLISHED Reserved 2026-06-24 | Published 2026-06-24 | Updated 2026-06-25 | Assigner redhat




MEDIUM: 6.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Problem types

Improper Authentication

Product status

Default status
affected

Default status
affected

Timeline

2026-06-24:Reported to Red Hat.
2026-06-24:Made public.

Credits

This issue was discovered by Huzaifa Sidhpurwala (Red Hat).

References

access.redhat.com/security/cve/CVE-2026-13208 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2492220 (RHBZ#2492220) issue-tracking

cve.org (CVE-2026-13208)

nvd.nist.gov (CVE-2026-13208)

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