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High severity · published Sep 3, 2026
CVE-2026-75033
Rancher: Cross-Cluster Secret Leakage via Namespace projectId Annotation Spoofing
7.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 27% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RA
Rancher · SUSE
before 2.15.1 · source: vendor, NVD
Affected product
RA
Rancher
SUSE
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-75033
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-75033
Release Notes
https://github.com/rancher/rancher/releases/tag/v2.15.1
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