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


- **Severity:** High 7.7 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 3 Sep 2026
- **Updated:** 3 Sep 2026

## What is CVE-2026-75033?

CVE-2026-75033 is a high-severity vulnerability in SUSE Rancher, published on 3 Sep 2026. 

### 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.

Weakness: CWE-639 (Authorization Bypass Through User-Controlled Key)

## Which versions are affected by CVE-2026-75033?

It affects 1 product.


Products: Suse Rancher.

## How do I fix CVE-2026-75033?

No fix has been published for CVE-2026-75033 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-75033 being exploited?

There is no known exploitation of CVE-2026-75033 in the wild and no public exploit code.

## Other vulnerabilities in SUSE Rancher

- [CVE-2023-22647](https://insights.sbomify.com/CVE-2023-22647/): Rancher vulnerable to Privilege Escalation via manipulation of Secrets (critical 9.9)
- [CVE-2023-22651](https://insights.sbomify.com/CVE-2023-22651/): Rancher Webhook is misconfigured during upgrade process (critical 9.9)
- [CVE-2022-43757](https://insights.sbomify.com/CVE-2022-43757/): Rancher: Exposure of sensitive fields (critical 9.9)
- [CVE-2021-36782](https://insights.sbomify.com/CVE-2021-36782/): Rancher: Plaintext storage and exposure of credentials in Rancher API and cluster.management.cattle.io object (critical 9.9)
- [CVE-2021-36783](https://insights.sbomify.com/CVE-2021-36783/): Rancher: Failure to properly sanitize credentials in cluster template answers (critical 9.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-75033 and fix it if it is affected.

What it is: CVE-2026-75033 is a high-severity vulnerability in SUSE Rancher, published on 3 Sep 2026. 
Exploitation: There is no known exploitation of CVE-2026-75033 in the wild and no public exploit code.

Affected product: SUSE Rancher. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-75033/ (Markdown: https://insights.sbomify.com/CVE-2026-75033/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-75033
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-75033
- OSV: https://osv.dev/vulnerability/CVE-2026-75033

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-75033/
Summaries are generated and may contain mistakes; the official description above is the record.