CVE-2026-25705

HIGH

8.4

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.

CVE Details

CVSS v3.1 Score8.4

SeverityHIGH

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

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredHIGH

User InteractionREQUIRED

Published5/13/2026

Last Modified5/13/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-35

References

https://bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25705(meissner@suse.de)

https://github.com/rancher/rancher/security/advisories/GHSA-5v3h-x4wf-5c35(meissner@suse.de)

IOC Correlations

No correlations recorded

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