CVE-2026-6383: Kubevirt: kubevirt: unauthorized subresource access due to improper rbac evaluation
CSIRTS triage
- What
- Improper RBAC policy evaluation allows unauthorized access to KubeVirt subresources.
- Who is affected
- KubeVirt deployments across affected versions where RBAC policies do not correctly restrict subresource access.
- Urgency
- Medium severity; authentication bypass could enable privilege escalation in Kubernetes clusters.
- Action
- Update KubeVirt to a patched version that correctly evaluates RBAC policies for subresource access.
AI-assisted analysis generated from the source advisory — verify against the original.
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Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-6383
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-63830.15% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 4% of all EPSS-scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-6383 | coverage & exploitation status | NVD · CVE.org |
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