Vulnerability · Published Jun 24, 2026 · Assigned by redhat

CVE-2026-13208Kubevirt: virt-handler-rhel9: kubevirt: virt-handler notify server trusts vmi identity from unauthenticated grpc request body

Medium 6.5

In plain English

A medium-severity improper authentication in Red Hat OpenShift Virtualization 4 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 2% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.1%top 97.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Red Hat	Red Hat OpenShift Virtualization 4	see references
Red Hat	Red Hat OpenShift Virtualization 4	see references

Weakness: CWE-287 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

References

https://access.redhat.com/security/cve/CVE-2026-13208 vdb-entry, x_refsource_REDHAT
RHBZ#2492220 issue-tracking, x_refsource_REDHAT