Vulnerability · Published Jun 25, 2026 · Assigned by GitHub_M

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

Medium 5.8

In plain English

A medium-severity path traversal in k3s from k3s-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.8Medium

Exploit odds (30 days)0.2%top 94.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/k3s-io/k3s	1.35.3	GHSA-jxr7-mqhw-9p98
Go	github.com/k3s-io/k3s	1.34.6	GHSA-jxr7-mqhw-9p98
Go	github.com/k3s-io/k3s	1.33.10	GHSA-jxr7-mqhw-9p98
Go	github.com/k3s-io/k3s	no fix listed	GO-2026-5973

Affected products (as reported)

Vendor	Product	Versions
k3s-io	k3s	>= 1.35.0-rc1+k3s1, < 1.35.3+k3s1>= 1.34.0-rc1+k3s1, < 1.34.6+k3s1< 1.33.10+k3s1

Weakness: CWE-22 · Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H

References

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