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OpenAdvisories
High · 7.0 CVE-2026-44949 EUVD-2026-40335

Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook

Published Jun 30, 2026 · Updated Jun 30, 2026 · Assigned by suse

Description

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.

Affected products

VendorProductAffectedFixed
SUSE Rancher 0.7.0 – < 0.7.10, 0.8.0 – < 0.8.7, 0.9.0 – < 0.9.6, 0.10.0 – < 0.10.7 0.7.10

References