Rancher FleetWorkspace (v0.7.0-0.10.7) Unauth Webhook Priv Esc
CVE-2026-44949 Published on June 30, 2026
Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook
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.
Vulnerability Analysis
CVE-2026-44949 can be exploited with network access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity and availability.
Weakness Type
Missing Authentication for Critical Function
The software does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
Products Associated with CVE-2026-44949
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Affected Versions
SUSE Rancher:- Version 0.7.0 and below 0.7.10 is affected.
- Version 0.8.0 and below 0.8.7 is affected.
- Version 0.9.0 and below 0.9.6 is affected.
- Version 0.10.0 and below 0.10.7 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.