Vulnerability · Published Sep 3, 2026 · Assigned by suse

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

High 7.7

In plain English

A high-severity authorization bypass via user-controlled key in Rancher from SUSE. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)7.7High

Exploit odds (30 days)0.3%top 72.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
SUSE	Rancher	0 – before 2.15.1

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

References

https://github.com/rancher/rancher/releases/tag/v2.15.1