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CVE-2026-25705— Rancher Extensions have arbitrary file access via path traversal

Quick assessment

Affected
SUSE rancher
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Rancher是美国Rancher开源的一个开源容器管理平台，专为在生产环境中部署容器的组织而构建。 Rancher存在安全漏洞，该漏洞源于Extensions中compressedEndpoint字段存在路径遍历，可能导致恶意UI扩展注入代码、覆盖Rancher二进制文件或配置、篡改集群状态、写入主机节点文件系统以及与其他攻击向量链式利用。

CVSS 8.4 · High EPSS 0.49% · P40

Affected Version Matrix 4

VendorProduct Version RangeStatus
SUSE rancher 2.14.0< 2.14.1 affected
2.13.0< 2.13.5 affected
2.12.0< 2.12.9 affected
2.10.11< 2.11.13 affected
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I. Basic Information for CVE-2026-25705

Vulnerability Information
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Vulnerability Title
Rancher Extensions have arbitrary file access via path traversal
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
路径遍历：’…/…//’
Source: CVE Program / CVE List V5
Vulnerability Title
Rancher 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Rancher是美国Rancher开源的一个开源容器管理平台，专为在生产环境中部署容器的组织而构建。 Rancher存在安全漏洞，该漏洞源于Extensions中compressedEndpoint字段存在路径遍历，可能导致恶意UI扩展注入代码、覆盖Rancher二进制文件或配置、篡改集群状态、写入主机节点文件系统以及与其他攻击向量链式利用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
SUSE rancher 2.14.0 ~ 2.14.1 -

II. Public POCs for CVE-2026-25705

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III. Intelligence Information for CVE-2026-25705

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Vendor Advisories for CVE-2026-25705 (2)

Same Patch Batch · SUSE · 2026-05-13 · 3 CVEs total

CVE-2026-41050 9.9 CRITICAL Helm impersonation bypass of `RESTClientGetter` retains `cluster-admin` during template re
CVE-2026-41051 5.0 MEDIUM csync2 uses insecure temporary directories when compiled with C99 or later

IV. Related Vulnerabilities

Same product: rancher
Same vendor: SUSE
Same weakness: CWE-35

V. Comments for CVE-2026-25705

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