CVE-2026-13325 | Virt-handler-rhel9: kubevirt: kubevirt: disabletls migration setting removes authentication, exposing unauthenticated virtqemud proxy on all interfaces

A flaw was found in KubeVirt's migration proxy. When spec.configuration.migrations.disableTLS is set to true on the KubeVirt custom resource, the target virt-handler binds a plain TCP listener on all interfaces (0.0.0.0/::) on a random port with no authentication, peer allow-list, or handshake token. This listener proxies directly into the target virt-launcher's virtqemud control socket. An attacker with a running pod on the cluster network can connect to this listener and issue unfiltered libvirt RPC commands against another tenant's virtual machine, including reading VM memory and configuration, modifying VM state via QMP, or destroying the VM. The bind address is unconditionally 0.0.0.0 — configuring a dedicated migration network via migrations.network only changes the advertised migration IP, not the listener bind address, so the port remains reachable on the pod network even when a dedicated migration network is configured. The API documentation describes disableTLS as removing "the additional layer of live migration encryption" without disclosing that it also removes all mutual authentication.

Published: 2026-06-26 Last update: 2026-07-14 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2026-13325 is rated Low Risk (36.4/100): CVSS High severity, with low exploitation likelihood (EPSS 0.17%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2026-13325

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-27 — 0.17% —

Full EPSS history (1 record total)

Common vulnerability scoring system (CVSS) metrics for CVE-2026-13325

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
8.5 3.1 HIGH
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:L)
A normal user session is enough; they don’t have to be admin.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.8 6.0 [email protected]

Weakness enumeration for CVE-2026-13325

GitHub Security Advisory for CVE-2026-13325

GHSA-r578-whjq-mcfv · Severity: high — A flaw was found in KubeVirt's migration proxy. When spec.configuration.migrations.disableTLS is...

OS Trackers for CVE-2026-13325

vendor priority summary link
redhat medium — https://access.redhat.com/security/cve/CVE-2026-13325
suse high — https://www.suse.com/security/cve/CVE-2026-13325/

Affected software / configurations for CVE-2026-13325

Vendor Product Version Raw CPE
kubevirt kubevirt — cpe:2.3:a:kubevirt:kubevirt:-:*:*:*:*:kubernetes:*:*
redhat openshift_virtualization >= 4, <= 4.22.0 cpe:2.3:a:redhat:openshift_virtualization:*:*:*:*:*:*:*:*

References for CVE-2026-13325

URL Tags
https://access.redhat.com/security/cve/CVE-2026-13325 Mitigation Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2493378 Issue Tracking Vendor Advisory
cvelogic Threat Intelligence