Rancher Extensions Path Traversal in UIPlugin Enables Code Injection
CVE-2026-25705 Published on May 13, 2026
Rancher Extensions have arbitrary file access via path traversal
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.
Vulnerability Analysis
CVE-2026-25705 can be exploited with network access, requires user interaction and user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be very high.
Weakness Type
Path Traversal: '.../...//'
The software uses external input to construct a pathname that should be within a restricted directory, but it does not properly neutralize '.../...//' (doubled triple dot slash) sequences that can resolve to a location that is outside of that directory.
Products Associated with CVE-2026-25705
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Affected Versions
SUSE rancher:- Version 2.14.0 and below 2.14.1 is affected.
- Version 2.13.0 and below 2.13.5 is affected.
- Version 2.12.0 and below 2.12.9 is affected.
- Version 2.10.11 and below 2.11.13 is affected.