What is GHSA-jxr7-mqhw-9p98?

GHSA-jxr7-mqhw-9p98 is a security advisory published by GitHub Security Advisories with Medium severity. K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression

Which CVE IDs does GHSA-jxr7-mqhw-9p98 cover?

GHSA-jxr7-mqhw-9p98 covers the following CVE IDs: CVE-2026-54250. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-jxr7-mqhw-9p98?

GHSA-jxr7-mqhw-9p98 has a CVSS v3 base score of 5.8, published by GitHub Security Advisories.

Which products are affected by GHSA-jxr7-mqhw-9p98?

GHSA-jxr7-mqhw-9p98 affects 3 products, including: go/github.com/k3s-io/k3s:\u003e= 1.35.0-rc1, \u003c 1.35.3; go/github.com/k3s-io/k3s:\u003e= 1.34.0-rc1, \u003c 1.34.6; go/github.com/k3s-io/k3s:\u003c 1.33.10.

GHSA-jxr7-mqhw-9p98MediumCVSS 5.8

K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression

Vendor

GitHub Security Advisories

Published

July 14, 2026

Last Modified

July 14, 2026

🔗 CVE IDs covered (1)

CVE-2026-54250 →

📋 Description

Summary

A path traversal vulnerability exists in K3s's etcd snapshot decompression functionality. Zip files containing archive members with maliciously crafted names (e.g., ../../../../etc/password) can be written to arbitrary locations on the filesystem when an administrator restores the archive as a compressed etcd snapshot.

Mitigations

Enable golang's built-in insecure path protections when restoring snapshots by setting theGODEBUG environment variable:
```
GODEBUG=zipinsecurepath=0 k3s server --cluster-reset --cluster-reset-restore-path=/path/to/snapshot.zip
```
Manually extract the snapshot from the zip archive before restoring it. If the snapshot to be restored does not end with .zip, the vulnerable extraction code will not be executed.

Additional Notes

Administrators should be aware of the cautions noted in the "Security" section of the documentation on Restoring Snapshots.

🎯 Affected products3

go/github.com/k3s-io/k3s:>= 1.35.0-rc1, < 1.35.3
go/github.com/k3s-io/k3s:>= 1.34.0-rc1, < 1.34.6
go/github.com/k3s-io/k3s:< 1.33.10