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CVE-2026-54250— K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression

Quick assessment

Affected
k3s-io k3s
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.

k3s是k3s组织开源的一个轻量级Kubernetes。 k3s存在路径遍历漏洞，该漏洞源于etcd快照解压缩功能中的路径遍历问题，攻击者利用包含恶意名称的ZIP文件可将内容写入任意文件系统位置。以下版本受到影响：1.35.3+k3s1之前版本、1.34.6+k3s1之前版本和1.33.10+k3s1之前版本。

CVSS 5.8 · Medium EPSS 0.17% · P5

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 3

VendorProduct Version RangeStatus
k3s-io k3s >= 1.35.0-rc1+k3s1, < 1.35.3+k3s1 affected
>= 1.34.0-rc1+k3s1, < 1.34.6+k3s1 affected
< 1.33.10+k3s1 affected
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I. Basic Information for CVE-2026-54250

Vulnerability Information
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Vulnerability Title
K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression
Source: CVE Program / CVE List V5
Vulnerability Description
K3s is a fully conformant production-ready Kubernetes distribution. Prior to 1.35.3+k3s1, 1.34.6+k3s1, v1.33.10+k3s1, a path traversal vulnerability exists in K3s's etcd snapshot decompression functionality. Zip files containing archive members with maliciously crafted names can be written to arbitrary locations on the filesystem when an administrator restores the archive as a compressed etcd snapshot. This vulnerability is fixed in 1.35.3+k3s1, 1.34.6+k3s1, v1.33.10+k3s1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H
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
Vulnerability Title
k3s 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
k3s是k3s组织开源的一个轻量级Kubernetes。 k3s存在路径遍历漏洞，该漏洞源于etcd快照解压缩功能中的路径遍历问题，攻击者利用包含恶意名称的ZIP文件可将内容写入任意文件系统位置。以下版本受到影响：1.35.3+k3s1之前版本、1.34.6+k3s1之前版本和1.33.10+k3s1之前版本。
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
k3s-io k3s >= 1.35.0-rc1+k3s1, < 1.35.3+k3s1 -

II. Public POCs for CVE-2026-54250

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III. Intelligence Information for CVE-2026-54250

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Vendor Advisories for CVE-2026-54250 (1)

IV. Related Vulnerabilities

Same product: k3s
Same weakness: CWE-22

V. Comments for CVE-2026-54250

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