CVE-2026-25705— Rancher Extensions have arbitrary file access via path traversal
Possible ATT&CK Techniques 3AI
T1068 · Exploitation for Privilege Escalation T1546 · Event Triggered Execution T1059 · Command and Scripting InterpreterGet alerts for future matching vulnerabilitiesLog in to subscribe
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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
路径遍历：’…/…//’
Source: NVD (National Vulnerability Database)
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
II. Public POCs for CVE-2026-25705
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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
- CVE-2026-41050
Helm impersonation bypass of `RESTClientGetter` retains `clu - CVE-2025-62879
Rancher Backup Operator pod's logs leak S3 tokens - CVE-2025-62878
Local Path Provisioner vulnerable to Path Traversal via para - CVE-2025-67601
Rancher CLI skips TLS verification on Rancher CLI login comm - CVE-2024-58269
Rancher exposes sensitive information through audit logs
Same vendor: SUSE
- CVE-2026-41051
csync2 uses insecure temporary directories when compiled wit - CVE-2026-41050
Helm impersonation bypass of `RESTClientGetter` retains `clu - CVE-2026-25702
nftables disabled due to incorrect kernel backport - CVE-2025-62879
Rancher Backup Operator pod's logs leak S3 tokens - CVE-2025-62878
Local Path Provisioner vulnerable to Path Traversal via para
Same weakness: CWE-35
V. Comments for CVE-2026-25705
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