CVE-2026-25705 Rancher Extensions have arbitrary file access via path traversal

A vulnerability has been identified in Rancher's 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...

Directory Traversal

Overview Affected versions of this package are vulnerable to Directory Traversal via the compressedEndpoint field in a UIPlugin deployment. An attacker can overwrite binaries or configuration files, tamper with cluster state, or write to the host node filesystem by exploiting path traversal in th...