CVE-2026-54250

K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression

MEDIUM

5.8

CVSS Score

Published: June 25, 2026 at 05:56 PM UTC

Updated: October 25, 2026 at 10:10 PM UTC

1 product affected across 1 vendorK3s

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Severity

MEDIUM5.8

Exploit prediction

EPSS 0.2%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

K3s · K3S Io

90%

< 1.33.10+k3s1 >= 1.34.0-rc1+k3s1, < 1.34.6+k3s1 >= 1.35.0-rc1+k3s1, < 1.35.3+k3s1

Affected range stops below 1.33.10, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.34.6, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.35.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRM

Source: cverecord

https://github.com/k3s-io/k3s/security/advisories/GHSA-jxr7-mqhw-9p98

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.8MEDIUMGitHub_M

Attack Vector: LOCAL
Complexity: LOW
Privileges: HIGH
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: NONE
Integrity: HIGH
Availability: HIGH

Vector?

Quick Info

StatusAWAITING ANALYSIS

CWE

CWE-22

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