Skip to main content

Path Traversal: '.../...//'

CVE-2026-25705

High
8.4/10

Summary

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. This issue affects versions from 2.10.11 prior to 2.11.13, 2.12.0 prior to 2.12.9, 2.13.0 prior to 2.13.5 and 2.14.0 prior to 2.14.1. * 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.

  • LOW
  • NETWORK
  • HIGH
  • CHANGED
  • REQUIRED
  • HIGH
  • HIGH
  • HIGH

CWE-35 - 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.

References

Advisory Timeline

  • Published