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

{
  "id": "1e6e5db90e81359530e145c7b89c690ecc39a76bf340fb20c0294943f3995291",
  "url": "https://osv.dev/vulnerability/CVE-2026-32637",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "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.",
    "evidence": "osv:CVE-2026-32637",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-32637",
      "aliases": [
        "CVE-2026-32637",
        "GHSA-j2g6-362q-6qc6",
        "GO-2026-6259"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "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"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/velero-io/velero",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "26ef8fa7df68dfa9ab8aa4669b8ac47340b0c510"
                },
                {
                  "fixed": "3f8e3588496391979915ace065f732a9013c1cf0"
                },
                {
                  "fixed": "c7fa4bfe3571667e9731f3f504da3c6be709a24c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.18.1"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3f8e3588496391979915ace065f732a9013c1cf0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c7fa4bfe3571667e9731f3f504da3c6be709a24c"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.18.1-rc.1",
            "v1.18.0-rc.2",
            "v1.18.0",
            "v1.18.0-rc.1",
            "v1.10.0-rc.1",
            "v1.9.0-rc.2",
            "v1.7.0-rc.1",
            "v1.6.0",
            "v1.6.0-rc.2",
            "v1.6.0-rc.1",
            "v1.5.1",
            "v1.5.0-rc.1",
            "v1.5.0-beta.1",
            "v1.4.0",
            "v1.4.0-beta.1",
            "v1.3.0",
            "v1.3.0-beta.2",
            "v1.3.0-beta.1",
            "v1.2.0",
            "v1.2.0-beta.1",
            "v1.1.0",
            "v1.1.0-beta.2",
            "v1.1.0-beta.1",
            "v1.0.0",
            "v1.0.0-rc.1",
            "v1.0.0-beta.1",
            "v1.0.0-alpha.2",
            "v0.11.0",
            "v1.0.0-alpha.1",
            "v0.10.1",
            "v0.10.0",
            "v0.10.0-beta.1",
            "v0.9.0",
            "v0.9.0-alpha.3",
            "v0.9.0-alpha.2",
            "v0.9.0-alpha.1",
            "v0.8.1",
            "v0.8.0",
            "v0.8.0-rc.1",
            "v0.7.1",
            "v0.7.0",
            "v0.6.0",
            "v0.5.0",
            "v0.4.0",
            "v0.3.3",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-32637.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:43.137423781Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32637.json",
        "https://github.com/velero-io/velero/security/advisories/GHSA-j2g6-362q-6qc6",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-32637",
        "https://github.com/securego/gosec/issues/324",
        "https://github.com/velero-io/velero/commit/3f8e3588496391979915ace065f732a9013c1cf0",
        "https://github.com/velero-io/velero/commit/c7fa4bfe3571667e9731f3f504da3c6be709a24c"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/32xxx/CVE-2026-32637.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-32637",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 510905,
  "published_at": "2026-08-25T21:15:31.881+00:00"
}