Malcolm's Path Traversal in Archive Extraction Allows Arbitrary Directory Creation

{
  "id": "36b13d92b65ea1b37c2b9f5ce43fe0a970c47327e423c1a2733cf8146d489e24",
  "url": "https://osv.dev/vulnerability/CVE-2026-63134",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Malcolm's Path Traversal in Archive Extraction Allows Arbitrary Directory Creation",
    "summary": "Malcolm is a network traffic analysis tool suite. Prior to version 26.07.0, `safe-extract.py` protects file extraction with libarchive's secure flags, but creates directory entries with a raw `os.makedirs(os.path.join(dest, entry.pathname))` that has no traversal protection. An uploaded malicious archive containing a directory entry with a `../` sequence or an absolute path causes the filebeat processing container to create directories outside the intended extraction directory. Version 26.07.0 fixes the issue.",
    "evidence": "osv:CVE-2026-63134",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-63134",
      "aliases": [
        "CVE-2026-63134",
        "GHSA-65mm-vgrw-vqx4"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cisagov/malcolm",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "551ce2d94052f986a14662aabb85eecfe96d0a30"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "26.07.0"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "551ce2d94052f986a14662aabb85eecfe96d0a30"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v26.07.0"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "26.07.0"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v26.06.1",
            "v26.06.0",
            "v26.05.2",
            "v6.4.2",
            "v6.4.1",
            "v6.4.0",
            "v5.2.4",
            "v5.2.3",
            "v5.2.2",
            "v5.2.1",
            "v3.0.1",
            "v3.0.0",
            "v2.6.1",
            "v2.6.0",
            "v2.5.0",
            "v2.4.2",
            "v2.4.1",
            "v2.4.0.1",
            "v2.4.0",
            "v2.3.0",
            "v2.2.1",
            "v2.2.0",
            "v2.1.1",
            "v2.1.0",
            "v2.0.6",
            "v2.0.5",
            "v2.0.4",
            "v2.0.3",
            "v2.0.2",
            "v2.0.1",
            "v2.0.0",
            "v2.0.0-pre1",
            "v1.8.1",
            "v1.8.0",
            "v1.7.2",
            "v1.7.1a",
            "v1.7.1",
            "v1.7.0",
            "v1.6.0",
            "v1.5.2",
            "v1.5.1",
            "v1.5.0",
            "v1.4.0",
            "v1.3.1",
            "v1.3.0",
            "v1.2.2",
            "v1.2.1",
            "v1.2.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-63134.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:21.515008406Z",
      "provider": "osv",
      "references": [
        "https://github.com/cisagov/CSAF/blob/develop/csaf_files/OT/white/2026/icsa-26-230-01.json",
        "https://github.com/cisagov/Malcolm/releases/tag/v26.07.0",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63134.json",
        "https://github.com/cisagov/Malcolm/security/advisories/GHSA-65mm-vgrw-vqx4",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-63134",
        "https://www.cisa.gov/news-events/ics-advisories/icsa-26-230-01"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/63xxx/CVE-2026-63134.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-63134",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 487812,
  "published_at": "2026-08-11T20:29:38.642+00:00"
}