CVE-2026-44949 (GCVE-0-2026-44949)
Vulnerability from cvelistv5 – Published: 2026-06-30 14:41 – Updated: 2026-06-30 15:10
VLAI
EPSS
VEX
Title
Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-30 15:10 UTC
CWE
- CWE-306 - Missing authentication for critical function
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/rancher/webhook/security/advis… | vendor-advisory |
Impacted products
Date Public
2026-06-29 14:27
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