CVE-2026-25705

HighCVSS 8.4/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 8.4/10CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

Weakness enumeration

CWE-35

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

No affected versions have been published.

Timeline

Published: May 13, 2026
Last modified: Jun 17, 2026
NVD status: Awaiting Analysis

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