Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook
Priority LOW 31CWE-306Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- Present
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-306.
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00394 33rd percentileScored 2026-11-07
Fix Fixed Rancher (SUSE): 0.7.10, 0.8.7, 0.9.6 +1
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| SUSE | Rancher | 0.7.0 to before 0.7.10; 0.8.0 to before 0.8.7; 0.9.0 to before 0.9.6; 0.10.0 to before 0.10.7 | 0.7.10, 0.8.7, 0.9.6, 0.10.7 | Patch available | CNA |
- Rancher VendorSUSE Affected 0.7.0 to before 0.7.10; 0.8.0 to before 0.8.7; 0.9.0 to before 0.9.6; 0.10.0 to before 0.10.7 Fixed in 0.7.10, 0.8.7, 0.9.6, 0.10.7 Patch available CNA
Remediation
- Fix · CNA Rancher (SUSE) Fixed in 0.7.10, 0.8.7, 0.9.6, 0.10.7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44949
References
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Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences