CVE-2026-54250

K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression

State: Published
Severity: 5.8 Medium
Published: Jun 25, 2026
Updated: Jun 26, 2026
Reserved: Jun 12, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	5.8 Medium	CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H	GitHub_M

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Affected Products

Product	Versions
k3sk3s-io	>= 1.35.0-rc1+k3s1, < 1.35.3+k3s1Affected >= 1.34.0-rc1+k3s1, < 1.34.6+k3s1Affected < 1.33.10+k3s1Affected

References

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

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