CVE-2021-36776— Steve API proxy impersonation
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 Labs Rancher是美国Rancher Labs公司的一套开源的企业级容器管理平台。 Rancher Labs Rancher 2.5.10之前版本存在安全漏洞，远程攻击者利用该漏洞可以冒充任意用户。
Possible ATT&CK Techniques 1 AI
T1078 · Valid Accounts
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I. Basic Information for CVE-2021-36776
Vulnerability Information
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Vulnerability Title
Steve API proxy impersonation
Source: CVE Program / CVE List V5
Vulnerability Description
A Improper Access Control vulnerability in SUSE Rancher allows remote attackers impersonate arbitrary users. This issue affects: SUSE Rancher Rancher versions prior to 2.5.10.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Rancher Labs Rancher 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rancher Labs Rancher是美国Rancher Labs公司的一套开源的企业级容器管理平台。 Rancher Labs Rancher 2.5.10之前版本存在安全漏洞，远程攻击者利用该漏洞可以冒充任意用户。
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
II. Public POCs for CVE-2021-36776
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Same Patch Batch · SUSE · 2022-04-01 · 3 CVEs total
| CVE-2021-36775 | 8.8 HIGH | Deleting PRTBs associated to a group doesn't cause deletion of corresponding RoleBindings |
| CVE-2022-21947 | 8.3 HIGH | rancher desktop: Dashboard API is network accessible |
IV. Related Vulnerabilities
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Unauthenticated GitRepo Spec Mutation via Fleet Git Webhook
Same vendor: SUSE
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CVE-2026-88804
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CVE-2026-88805
Session Not Revoked Server-Side on Logout in Rancher -
CVE-2026-88808
Fleet agent copies downstream resources with cluster-admin p -
CVE-2026-93540
Fleet applies namespace labels and annotations without the b -
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Unauthenticated GitRepo Spec Mutation via Fleet Git Webhook
Same weakness: CWE-284
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V. Comments for CVE-2021-36776
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