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CVE-2026-44949— Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook

Quick assessment

Affected
SUSE Rancher
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rancher Webhook是Rancher公司的一款消息队列组件。 Rancher Webhook 0.7.0至0.7.10之前版本、0.8.0至0.8.7之前版本、0.9.0至0.9.6之前版本以及0.10.0至0.10.7之前版本存在授权问题漏洞，该漏洞源于FleetWorkspace准入路径允许在Rancher webhook处理器中产生副作用，可能导致未经身份验证的攻击者通过网络访问集群内rancher-webhook服务，提交特制的准入有效载荷，从而创建具有攻击者选择的身份数据的工作区相关K

AI Predicted 7.5 Difficulty: Easy EPSS 0.39% · P33

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 4

VendorProduct Version RangeStatus
SUSE Rancher 0.7.0< 0.7.10 affected
0.8.0< 0.8.7 affected
0.9.0< 0.9.6 affected
0.10.0< 0.10.7 affected
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I. Basic Information for CVE-2026-44949

Vulnerability Information
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Vulnerability Title
Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace mutating webhook
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Rancher Webhook 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rancher Webhook是Rancher公司的一款消息队列组件。 Rancher Webhook 0.7.0至0.7.10之前版本、0.8.0至0.8.7之前版本、0.9.0至0.9.6之前版本以及0.10.0至0.10.7之前版本存在授权问题漏洞，该漏洞源于FleetWorkspace准入路径允许在Rancher webhook处理器中产生副作用，可能导致未经身份验证的攻击者通过网络访问集群内rancher-webhook服务，提交特制的准入有效载荷，从而创建具有攻击者选择的身份数据的工作区相关K
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE Rancher 0.7.0 ~ 0.7.10 -

II. Public POCs for CVE-2026-44949

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III. Intelligence Information for CVE-2026-44949

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Vendor Advisories for CVE-2026-44949 (1)

Same Patch Batch · SUSE · 2026-06-30 · 5 CVEs total

CVE-2026-41053 8.8 HIGH Over-inclusive team membership expansion in GitHub App authentication provider for Rancher
CVE-2026-44947 Stale PSA ClusterRoleBinding Persists After RoleTemplate Downgrade in Rancher
CVE-2026-44948 Path Traversal in Rancher Fleet ImageScan GitRepo Path Handler
CVE-2026-44946 SAML Authentication Replay in Rancher

IV. Related Vulnerabilities

Same product: Rancher
Same vendor: SUSE
Same weakness: CWE-306

V. Comments for CVE-2026-44949

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