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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.

PUBLISHED Reserved 2026-02-05 | Published 2026-05-13 | Updated 2026-05-14 | Assigner suse




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

Problem types

CWE-35 Path traversal: '.../...//'

Product status

Default status
unaffected

2.14.0 (semver) before 2.14.1
affected

2.13.0 (semver) before 2.13.5
affected

2.12.0 (semver) before 2.12.9
affected

2.10.11 (semver) before 2.11.13
affected

Credits

https://github.com/KoreaSecurity finder

References

bugzilla.suse.com/show_bug.cgi?id=CVE-2026-25705

github.com/...ancher/security/advisories/GHSA-5v3h-x4wf-5c35

cve.org (CVE-2026-25705)

nvd.nist.gov (CVE-2026-25705)

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