Vulnerability-Lookup

GHSA-J2G6-362Q-6QC6

Vulnerability from github – Published: 2026-08-20 17:26 – Updated: 2026-08-20 17:26

Summary

Velero vulnerable to file path traversal when extracting from backup's tarball

Details

Impact

What kind of vulnerability is it? Who is impacted? If the attacker compromises the backup's object storage backend and uploads a malicious backup tarball including file names like the following: * ../../../tmp/escape_1 -> file created at /tmp/escape_1 * ../../../../../../../../tmp/escape_2 -> file created at /tmp/escape_2 * ../../../tmp/cron_poc -> would be /etc/cron.d/backdoor in real attack * ../../../tmp/ssh_poc -> would be ~/.ssh/authorized_keys * ../../../tmp/kubeconfig_poc -> would be ~/.kube/config

It's possible that extracting files from the tarball during restore can overwrite sensitive files in the Velero pod filesystem.

Patches

Has the problem been patched? What versions should users upgrade to?

By far, there is no patch yet. We are working on the main branch, then cherry-pick to the release-1.18 for v1.18.1 patch.

Workarounds

Is there a way for users to fix or remediate the vulnerability without upgrading?

There is no workaround, but the good news is that keeping your OSS safe will prevent the vulnerability.

Severity

6.9 (Medium)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/vmware-tanzu/velero"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.18.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-32637"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-22"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-08-20T17:26:07Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Impact\n_What kind of vulnerability is it? Who is impacted?_\nIf the attacker compromises the backup\u0027s object storage backend and uploads a malicious backup tarball including file names like the following:\n* ../../../tmp/escape_1              -\u003e file created at /tmp/escape_1\n* ../../../../../../../../tmp/escape_2 -\u003e file created at /tmp/escape_2\n* ../../../tmp/cron_poc              -\u003e would be /etc/cron.d/backdoor in real attack\n* ../../../tmp/ssh_poc               -\u003e would be ~/.ssh/authorized_keys\n* ../../../tmp/kubeconfig_poc        -\u003e would be ~/.kube/config\n\nIt\u0027s possible that extracting files from the tarball during restore can overwrite sensitive files in the Velero pod filesystem. \n\n### Patches\n_Has the problem been patched? What versions should users upgrade to?_\n\nBy far, there is no patch yet.\nWe are working on the main branch, then cherry-pick to the release-1.18 for v1.18.1 patch.\n\n### Workarounds\n_Is there a way for users to fix or remediate the vulnerability without upgrading?_\n\nThere is no workaround, but the good news is that keeping your OSS safe will prevent the vulnerability.",
  "id": "GHSA-j2g6-362q-6qc6",
  "modified": "2026-08-20T17:26:08Z",
  "published": "2026-08-20T17:26:07Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/velero-io/velero/security/advisories/GHSA-j2g6-362q-6qc6"
    },
    {
      "type": "WEB",
      "url": "https://github.com/securego/gosec/issues/324"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/velero-io/velero"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Velero vulnerable to file path traversal when extracting from backup\u0027s tarball"
}

CVE-2026-32637 (GCVE-0-2026-32637)

Vulnerability from cvelistv5 – Published: 2026-08-25 21:15 – Updated: 2026-08-28 22:38

Title

Velero vulnerable to file path traversal when extracting from backup's tarball

Summary

Velero is an open source tool for backing up, restoring, and migrating Kubernetes cluster resources and persistent volumes. Prior to 1.18.1, an attacker who compromises the backup object-storage backend can upload a malicious backup tarball containing parent-directory paths that escape the extraction directory during restore and overwrite sensitive files in the Velero pod filesystem. This issue is fixed in version 1.18.1.

Severity

5.9 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-28 22:38 UTC

CWE

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

Assigner

GitHub_M mitre root

References

4 references

URL	Tags
https://github.com/velero-io/velero/security/advi…	x_refsource_CONFIRM
https://github.com/securego/gosec/issues/324	x_refsource_MISC
https://github.com/velero-io/velero/commit/3f8e35…	x_refsource_MISC
https://github.com/velero-io/velero/commit/c7fa4b…	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
velero-io	velero	Affected: < 1.18.1

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-32637",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-28T22:38:12.852792Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-28T22:38:21.971Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "velero",
          "vendor": "velero-io",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.18.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Velero is an open source tool for backing up, restoring, and migrating Kubernetes cluster resources and persistent volumes. Prior to 1.18.1, an attacker who compromises the backup object-storage backend can upload a malicious backup tarball containing parent-directory paths that escape the extraction directory during restore and overwrite sensitive files in the Velero pod filesystem. This issue is fixed in version 1.18.1."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "ACTIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory (\u0027Path Traversal\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-25T21:15:31.881Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/velero-io/velero/security/advisories/GHSA-j2g6-362q-6qc6",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/velero-io/velero/security/advisories/GHSA-j2g6-362q-6qc6"
        },
        {
          "name": "https://github.com/securego/gosec/issues/324",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/securego/gosec/issues/324"
        },
        {
          "name": "https://github.com/velero-io/velero/commit/3f8e3588496391979915ace065f732a9013c1cf0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/velero-io/velero/commit/3f8e3588496391979915ace065f732a9013c1cf0"
        },
        {
          "name": "https://github.com/velero-io/velero/commit/c7fa4bfe3571667e9731f3f504da3c6be709a24c",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/velero-io/velero/commit/c7fa4bfe3571667e9731f3f504da3c6be709a24c"
        }
      ],
      "source": {
        "advisory": "GHSA-j2g6-362q-6qc6",
        "discovery": "UNKNOWN"
      },
      "title": "Velero vulnerable to file path traversal when extracting from backup\u0027s tarball"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-32637",
    "datePublished": "2026-08-25T21:15:31.881Z",
    "dateReserved": "2026-03-12T15:29:36.559Z",
    "dateUpdated": "2026-08-28T22:38:21.971Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.