CVE-2026-54250

MEDIUM

K3s < 1.35.3/1.34.6/1.33.10 - etcd Snapshot ZIP Path Traversal

Title source: manual
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v3 5.8
EPSS 0.0012
EPSS Percentile 2.4%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-22
Status published
Products (6)
k3s-io/k3s 0 - 1.33.10Go
k3s-io/k3s 1.34.0-rc1 - 1.34.6Go
k3s-io/k3s 1.35.0-rc1 - 1.35.3Go
k3s-io/k3s < 1.33.10+k3s1
k3s-io/k3s >= 1.34.0-rc1+k3s1, < 1.34.6+k3s1
k3s-io/k3s >= 1.35.0-rc1+k3s1, < 1.35.3+k3s1
Published Jun 25, 2026
Tracked Since Jun 26, 2026