Moderate severityNVD Advisory· Published Jun 25, 2026· Updated Jun 26, 2026
K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression
CVE-2026-54250
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
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/k3s-io/k3sGo | >= 1.35.0-rc1, < 1.35.3 | 1.35.3 |
github.com/k3s-io/k3sGo | >= 1.34.0-rc1, < 1.34.6 | 1.34.6 |
github.com/k3s-io/k3sGo | < 1.33.10 | 1.33.10 |
Affected products
4- osv-coords3 versionspkg:apk/chainguard/rke2-cloud-providerpkg:apk/chainguard/rke2-cloud-provider-fipspkg:apk/wolfi/rke2-cloud-provider
< 1.36.2-r0+ 2 more
- (no CPE)range: < 1.36.2-r0
- (no CPE)range: < 1.36.2-r0
- (no CPE)range: < 1.36.2-r0
Patches
Vulnerability mechanics
References
3- github.com/advisories/GHSA-jxr7-mqhw-9p98ghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-54250ghsaADVISORY
- github.com/k3s-io/k3s/security/advisories/GHSA-jxr7-mqhw-9p98ghsax_refsource_CONFIRMWEB
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