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CVE-2026-41053— Over-inclusive team membership expansion in GitHub App authentication provider for Rancher

Quick assessment

Affected
SUSE Rancher
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rancher是Rancher组织开源的一个开源容器管理平台,专为在生产环境中部署容器的组织而构建。 Rancher 2.13.6版本之前的2.13.x版本和2.14.2版本之前的2.14.x版本存在授权问题漏洞，该漏洞源于Rancher Github身份验证提供程序的团队成员扩展中存在不正确的身份验证缓存，导致任何登录用户获得主体访问权限。

CVSS 8.8 · High EPSS 0.52% · P43

Affected Version Matrix 2

VendorProduct Version RangeStatus
SUSE Rancher 2.14.0< 2.14.2 affected
2.13.0< 2.13.6 affected
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I. Basic Information for CVE-2026-41053

Vulnerability Information
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Vulnerability Title
Over-inclusive team membership expansion in GitHub App authentication provider for Rancher
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect authentication caching in the team member ship expansion of the Rancher Github authentication provider caused it granting principal access to any logged in user, in 2.13 before 2.13.6 and 2.14 before 2.14.2.
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
认证算法的不正确实现
Source: CVE Program / CVE List V5
Vulnerability Title
Rancher 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rancher是Rancher组织开源的一个开源容器管理平台,专为在生产环境中部署容器的组织而构建。 Rancher 2.13.6版本之前的2.13.x版本和2.14.2版本之前的2.14.x版本存在授权问题漏洞，该漏洞源于Rancher Github身份验证提供程序的团队成员扩展中存在不正确的身份验证缓存，导致任何登录用户获得主体访问权限。
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 2.14.0 ~ 2.14.2 -

II. Public POCs for CVE-2026-41053

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9007 chars
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III. Intelligence Information for CVE-2026-41053

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Vendor Advisories for CVE-2026-41053 (1)

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

CVE-2026-44947 Stale PSA ClusterRoleBinding Persists After RoleTemplate Downgrade in Rancher
CVE-2026-44949 Unauthenticated namespace creation and RBAC injection via rancher-webhook FleetWorkspace m
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-303

V. Comments for CVE-2026-41053

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