CVE-2026-44949 HIGH

CVE-2026-44949: Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook

Vendor Suse
Product Rancher
Weakness CWE-306 · Missing auth
Published June 30, 2026
Last update June 30, 2026

CVSS base score

7.0/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 30, 2026 CVE published
June 30, 2026 Record updated