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CVE-2026-75033— Rancher: Cross-Cluster Secret Leakage via Namespace projectId Annotation Spoofing

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.

SUSE rancher是德国SUSE公司开源的一款一套容器管理平台。 SUSE rancher 2.15.1之前版本存在授权问题漏洞，该漏洞源于Project Secrets传播到命名空间时仅依赖 注解，而未验证引用的项目是否属于同一下游集群，可能导致用户在一个集群中创建命名空间，将注解设置为另一集群的项目ID，从而将该项目的Secrets复制到其控制的命名空间中。

CVSS 7.7 · High EPSS 0.34% · P28

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts

Affected Version Matrix 1

VendorProduct Version RangeStatus
SUSE Rancher < 2.15.1 affected
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I. Basic Information for CVE-2026-75033

Vulnerability Information
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Vulnerability Title
Rancher: Cross-Cluster Secret Leakage via Namespace projectId Annotation Spoofing
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Rancher Manager. Project Secrets were propagated into a namespace based only on its `field.cattle.io/projectId` annotation, without verifying that the referenced project belonged to the same downstream cluster. A user able to create namespaces on one cluster could set the annotation to a project ID from another cluster and have that project's secrets copied into a namespace under their control. This issue affects Rancher: before 2.15.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
SUSE rancher 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SUSE rancher是德国SUSE公司开源的一款一套容器管理平台。 SUSE rancher 2.15.1之前版本存在授权问题漏洞，该漏洞源于Project Secrets传播到命名空间时仅依赖`field.cattle.io/projectId`注解，而未验证引用的项目是否属于同一下游集群，可能导致用户在一个集群中创建命名空间，将注解设置为另一集群的项目ID，从而将该项目的Secrets复制到其控制的命名空间中。
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 ~ 2.15.1 -

II. Public POCs for CVE-2026-75033

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III. Intelligence Information for CVE-2026-75033

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Vendor Pages for CVE-2026-75033 (1)

Same Patch Batch · SUSE · 2026-09-03 · 6 CVEs total

CVE-2026-71404 8.7 HIGH Rancher: Ownership-less ClusterRole overwrite via attacker-controlled cr-name annotation o
CVE-2026-75035 7.7 HIGH Rancher: ext.cattle.io/v1 Token store: cross-user token disclosure via label-selector scop
CVE-2026-75034 7.4 HIGH Rancher: SAML Assertion Replay
CVE-2026-71403 6.1 MEDIUM Rancher: Identity-field mutation in /v3/users allows account hijack via principal rebind
CVE-2026-75036 5.3 MEDIUM Fleet: DNS exfiltration via Sprig getHostByName in fleet.yaml Helm template preprocessing

IV. Related Vulnerabilities

Same product: Rancher
Same vendor: SUSE
Same weakness: CWE-639