Vulnerability-Lookup

CVE-2026-54250 (GCVE-0-2026-54250)

Vulnerability from cvelistv5 – Published: 2026-06-25 17:56 – Updated: 2026-06-26 18:42

Title

K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression

Summary

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.

Severity

5.8 (Medium)


                        
                          CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-26 17:50 UTC

CWE

CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Assigner

GitHub_M mitre root

References

1 reference

URL	Tags
https://github.com/k3s-io/k3s/security/advisories…	x_refsource_CONFIRM

Impacted products

1 product

Vendor	Product	Version	CPE status
k3s-io	k3s	Affected: >= 1.35.0-rc1+k3s1, < 1.35.3+k3s1 Affected: >= 1.34.0-rc1+k3s1, < 1.34.6+k3s1 Affected: < 1.33.10+k3s1	guessed

Show details on NVD website

JSON

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FKIE_CVE-2026-54250

Vulnerability from fkie_nvd - Published: 2026-06-25 19:16 - Updated: 2026-06-26 19:16

Severity

5.8 (Medium) - CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H

Summary

References

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

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "k3s",
          "vendor": "k3s-io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.35.0-rc1+k3s1, \u003c 1.35.3+k3s1"
            },
            {
              "status": "affected",
              "version": "\u003e= 1.34.0-rc1+k3s1, \u003c 1.34.6+k3s1"
            },
            {
              "status": "affected",
              "version": "\u003c 1.33.10+k3s1"
            }
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    }
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      "lang": "en",
      "value": "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\u0027s 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."
    }
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          "confidentialityImpact": "NONE",
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GHSA-JXR7-MQHW-9P98

Vulnerability from github – Published: 2026-07-14 17:54 – Updated: 2026-07-14 17:54

Summary

K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression

Details

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: bash 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.

Severity

5.8 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/k3s-io/k3s"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.35.0-rc1"
            },
            {
              "fixed": "1.35.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/k3s-io/k3s"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.34.0-rc1"
            },
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          "type": "ECOSYSTEM"
        }
      ]
    },
    {
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        "name": "github.com/k3s-io/k3s"
      },
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        {
          "events": [
            {
              "introduced": "0"
            },
            {
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            }
          ],
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        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-54250"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-07-14T17:54:14Z",
    "nvd_published_at": "2026-06-25T19:16:41Z",
    "severity": "MODERATE"
  },
  "details": "#### Summary\n\nA path traversal vulnerability exists in K3s\u0027s 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.\n\n#### Mitigations\n\n* Enable golang\u0027s built-in [insecure path protections](https://pkg.go.dev/archive/zip#NewReader) when restoring snapshots by setting the`GODEBUG` environment variable:\n    ```bash\n    GODEBUG=zipinsecurepath=0 k3s server --cluster-reset --cluster-reset-restore-path=/path/to/snapshot.zip\n    ```\n* 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.\n\n#### Additional Notes\n\nAdministrators should be aware of the cautions noted in the \"Security\" section of the documentation on [Restoring Snapshots](https://docs.k3s.io/cli/etcd-snapshot#security).",
  "id": "GHSA-jxr7-mqhw-9p98",
  "modified": "2026-07-14T17:54:14Z",
  "published": "2026-07-14T17:54:14Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/k3s-io/k3s/security/advisories/GHSA-jxr7-mqhw-9p98"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-54250"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/k3s-io/k3s"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "K3s: ZIP Archive Path Traversal Vulnerability in etcd Snapshot Decompression"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

CVE-2026-54250 (GCVE-0-2026-54250)

FKIE_CVE-2026-54250

GHSA-JXR7-MQHW-9P98

Summary

Mitigations

Additional Notes

Tags

Sightings

Nomenclature