What’s Vulnerable › Vulnerabilities
CVE-2026-44949: Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook
- Severity: high (CVSS 7.0 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-30 · updated 2026-10-25
- Weakness: CWE-306
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
- SUSE Rancher: from 0.7.0 before 0.7.10; from 0.8.0 before 0.8.7; from 0.9.0 before 0.9.6; from 0.10.0 before 0.10.7 — fixed in 0.10.7, 0.7.10, 0.8.7, 0.9.6
How to fix
Upgrade to a fixed version: SUSE Rancher 0.10.7, 0.7.10, 0.8.7, 0.9.6. Check the vendor advisory for mitigations.
References
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