CVE-2026-19444— Kubernetes kubectl cp path traversal on Windows allows arbitrary file writes
Quick assessment
Affected
Kubernetes Kubernetes
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.
在 Kubernetes 的 客户端中，Windows 平台上的 命令存在一个路径遍历漏洞。当从容器中复制文件时， 会在容器内部执行 命令以构建 tar 归档文件，通过网络将其传输到本地机器，并在本地解包。如果容器内的 二进制文件是恶意的，攻击者可能执行任意代码并产生非预期的输出，从而在调用 时，将文件写入本地用户机器上的任意路径（受限于本地用户的系统权限）。该问题仅影响运行在 Windows 系统上的 客户端。
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I. Basic Information for CVE-2026-19444
Vulnerability Information
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Vulnerability Title
Kubernetes kubectl cp path traversal on Windows allows arbitrary file writes
Source: CVE Program / CVE List V5
Vulnerability Description
A path traversal vulnerability was discovered in the Kubernetes kubectl client's kubectl cp command on Windows. When copying files from a container, kubectl runs tar inside the container to build a tar archive, transfers it over the network, and unpacks it on the local machine. If the tar binary in the container is malicious, it can execute arbitrary code and emit unexpected output, allowing an attacker who controls container contents to write files to arbitrary paths on the user's local machine when kubectl cp is invoked, limited only by the system permissions of the local user. This issue only affects kubectl clients running on Windows.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:A/AC:L/PR:H/UI:R/S:C/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Kubernetes | Kubernetes | v1.36.0 ~ v1.36.4 | - |
|
II. Public POCs for CVE-2026-19444
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-19444 (3)
-
https://github.com/kubernetes/kubernetes/issues/141294 issue-tracking
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V. Comments for CVE-2026-19444
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