Vulnerability · Published May 13, 2026 · Assigned by suse
CVE-2026-25705Rancher Extensions have arbitrary file access via path traversal
High 8.4
In plain English
A high-severity security flaw 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 0.4% (higher than 31% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/rancher/rancher | 2.14.1 | GHSA-5v3h-x4wf-5c35 |
| Go | github.com/rancher/rancher | 2.13.5 | GHSA-5v3h-x4wf-5c35 |
| Go | github.com/rancher/rancher | 2.12.9 | GHSA-5v3h-x4wf-5c35 |
| Go | github.com/rancher/rancher | 2.11.13 | GHSA-5v3h-x4wf-5c35 |
| Go | github.com/rancher/rancher | no fix listed | GO-2026-5154 |
Affected products (as reported)
Weakness: CWE-35 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H