Rancher Extensions have arbitrary file access via path traversal

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Summary

CVECVE-2026-25705
StatePUBLISHED
Assignersuse
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-13 08:16:16 UTC
Updated2026-05-13 15:35:35 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 8.4 HIGH from [email protected]

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

EPSS: 0.000420000 probability, percentile 0.127730000 (date 2026-05-13)

Problem Types: CWE-35 | CWE-35 CWE-35 Path traversal: '.../...//'

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.4HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
3.1CNACVSS8.4HIGHCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA SUSE Rancher affected 2.14.0 2.14.1 semver Not specified
CNA SUSE Rancher affected 2.13.0 2.13.5 semver Not specified
CNA SUSE Rancher affected 2.12.0 2.12.9 semver Not specified
CNA SUSE Rancher affected 2.10.11 2.11.13 semver Not specified

References

ReferenceSourceLinkTags
github.com/rancher/rancher/security/advisories/GHSA-5v3h-x4wf-5c35 [email protected] github.com
bugzilla.suse.com/show_bug.cgi [email protected] bugzilla.suse.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: https://github.com/KoreaSecurity (en)

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