Description
A vulnerability has been identified in [Rancher's Extensions](https://ranchermanager.docs.rancher.com/integrations-in-rancher/rancher-extensions) where malicious code can be injected in Rancher through a path traversal in the `compressedEndpoint` field inside a `UIPlugin` deployment. A malicious UI extension could abuse that to: * Overwrite Rancher binaries or configuration to inject code.
* Write to /var/lib/rancher/ to tamper with cluster state.
* If hostPath volumes are mounted, write to the host node filesystem.
* Use this issue to chain with other attack vectors.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| SUSE | rancher | 2.14.0 – < 2.14.1, 2.13.0 – < 2.13.5, 2.12.0 – < 2.12.9, 2.10.11 – < 2.11.13 | 2.14.1 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | govulncheck-vulndb | 0.0.20260723T184607-160000.1.1 | openSUSE-SU-2026:21483-1 |
Affected packages
| Ecosystem | Package | Affected | Fixed | Record |
|---|---|---|---|---|
| Go | github.com/rancher/rancher | >= 2.14.0, < 2.14.1 | 2.14.1 | GHSA-5v3h-x4wf-5c35 |
| Go | github.com/rancher/rancher | >= 2.13.0, < 2.13.5 | 2.13.5 | GHSA-5v3h-x4wf-5c35 |
| Go | github.com/rancher/rancher | >= 2.12.0, < 2.12.9 | 2.12.9 | GHSA-5v3h-x4wf-5c35 |
| Go | github.com/rancher/rancher | >= 2.10.11, < 2.11.13 | 2.11.13 | GHSA-5v3h-x4wf-5c35 |
| Go | github.com/rancher/rancher | all versions | — | GO-2026-5154 |
Advisories 2
- openSUSE-SU-2026:21483-1 Security update for govulncheck-vulndb SUSE / openSUSE Security Updates · Jul 31, 2026
- WID-SEC-2026-1347 Rancher: Schwachstelle ermöglicht Codeausführung und Manipulation von Dateien BSI CERT-Bund (WID) · May 14, 2026