CVE-2026-44949 PUBLISHED

Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook

Assigner: suse
Reserved: 08.05.2026 Published: 30.06.2026 Updated: 30.06.2026

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.

Metrics

CVSS 4.0

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
CVSS Score: 7

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	Present	Availability	None	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	SUSE
Product	Rancher
Versions	Default: unaffected affected from 0.7.0 to 0.7.10 (excl.) affected from 0.8.0 to 0.8.7 (excl.) affected from 0.9.0 to 0.9.6 (excl.) affected from 0.10.0 to 0.10.7 (excl.)

References

https://github.com/rancher/webhook/security/advisories/GHSA-h83p-cq95-vph4

Problem Types

CWE-306 Missing authentication for critical function CWE

Impacts

CAPEC-233 Privilege Escalation