CVE-2026-25705
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
13/05/2026
Last modified:
13/05/2026
Description
A vulnerability has been identified in [Rancher&#39;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.<br />
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* Write to /var/lib/rancher/ to tamper with cluster state.<br />
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* If hostPath volumes are mounted, write to the host node filesystem.<br />
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* Use this issue to chain with other attack vectors.
Impact
Base Score 3.x
8.40
Severity 3.x
HIGH