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GHSA-jxr7-mqhw-9p98

MediumCVSS 5.8 / 10
Published Jul 14, 2026·Last modified Jul 14, 2026
Affected Components(0)

No affected components available

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.

Risk Scores
Base Score
5.8

The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. The attacker needs the user to perform some action, like clicking a link. The impact is confined to the system where the vulnerability exists. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.

Threat Intelligence
5.3

Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.

EPSS
N/A

Probability that this vulnerability will be exploited in the wild within the next 30 days.

Exploit
Not available

We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.

Related Vulnerabilities
  • CVE-2026-54250
    Alias
  • EUVD-2026-39512
    Alias

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Medium severity
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