CVE-2026-44949
HighCVSS 7.0Exploitation Probability (EPSS)
Low risk14th percentile — higher than 14% of all known CVEs
Summary
A vulnerability in Rancher FleetWorkspace allows an unauthenticated attacker with network access to the in-cluster rancher-webhook service to create workspace-related Kubernetes objects with attacker-chosen identity data. Affected versions are 0.7.0 to 0.7.10, 0.8.0 to 0.8.7, 0.9.0 to 0.9.6, and 0.10.0 to 0.10.7.
Risk Assessment
An attacker can create Kubernetes objects with forged identity, potentially leading to privilege escalation, data integrity compromise, or further attacks within the cluster.
Recommendation
Immediately update Rancher Fleet to version 0.7.11, 0.8.8, 0.9.7, or 0.10.8 depending on your branch, and restrict network access to the rancher-webhook service.
Original NVD description (English source)
A Rancher FleetWorkspace admission path allowed side effects to occur in the Rancher webhook handler for versions 0.7.0 up to 0.7.10, 0.8.0 up to 0.8.7, 0.9.0 up to 0.9.6 and 0.10.0 up to 0.10.7. An unauthenticated attacker with network access to the in-cluster rancher-webhook service could submit a crafted admission payload and cause workspace-related Kubernetes objects to be created with attacker-chosen identity data.