Report: CVE-2026-25705 - Rancher Extensions have arbitrary file access via path traversal - Expert Insights

Report: CVE-2026-25705 - Rancher Extensions have arbitrary file access via path traversal - Expert Insights

CVE ID :CVE-2026-25705 Published : May 13, 2026, 8 a.m. | 1 hour, 31 minutes ago Description :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 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. Severity: 8.4 | HIGH Visit the link for more details, such as CVSS details, affected products, timeline, and more...

CVE Details

Severity
HIGH
Published
May 13, 2026
Affected Product: Rancher
Impact: path traversal