SUSE Rancher up to 2.11.12/2.12.8/2.13.4/2.14.0 UI Handler /var/lib/rancher/ compressedEndpoint path traversal

Summaryinfo

A vulnerability was found in SUSE Rancher up to 2.11.12/2.12.8/2.13.4/2.14.0. It has been rated as critical. This affects an unknown function in the library /var/lib/rancher/ of the component UI Handler. The manipulation of the argument compressedEndpoint leads to path traversal. This vulnerability is listed as CVE-2026-25705. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in SUSE Rancher up to 2.11.12/2.12.8/2.13.4/2.14.0. This issue affects an unknown function in the library /var/lib/rancher/ of the component UI Handler. The manipulation of the argument compressedEndpoint with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-35. The product 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at bugzilla.suse.com. The identification of this vulnerability is CVE-2026-25705 since 02/05/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are necessary for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/13/2026). The attack technique deployed by this issue is T1006 according to MITRE ATT&CK.

Upgrading to version 2.11.13, 2.12.9, 2.13.5 or 2.14.1 eliminates this vulnerability.

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Productinfo

Vendor

• SUSE

Name

• Rancher

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9
• 2.10
• 2.11
• 2.11.0
• 2.11.1
• 2.11.2
• 2.11.3
• 2.11.4
• 2.11.5
• 2.11.6
• 2.11.7
• 2.11.8
• 2.11.9
• 2.11.10
• 2.11.11
• 2.11.12
• 2.12
• 2.12.0
• 2.12.1
• 2.12.2
• 2.12.3
• 2.12.4
• 2.12.5
• 2.12.6
• 2.12.7
• 2.12.8
• 2.13
• 2.13.0
• 2.13.1
• 2.13.2
• 2.13.3
• 2.13.4
• 2.14.0

License

• open-source

Website

• Vendor: https://www.suse.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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