libreoffice-convert: path traversal / arbitrary file write

{
  "id": "f30e34c7a7c21c7b2eb90b02ad4ae2a859e1ca84e670c7f716823f06b0698230",
  "url": "https://osv.dev/vulnerability/CVE-2026-54732",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "libreoffice-convert: path traversal / arbitrary file write",
    "summary": "libreoffice-convert is a Node.js module for converting office documents to different formats. Prior to 1.8.2, index.js uses the caller-controlled options.fileName value in path.join(tempDir.name, fileName) without reducing it to a base name. A filename containing ../ can escape the temporary directory because path.basename() normalization is missing and write the supplied document buffer to an arbitrary path writable by the process, including an SSH authorized_keys file, a cron configuration, or a web root. This issue is fixed in version 1.8.2.",
    "evidence": "osv:CVE-2026-54732",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-54732",
      "aliases": [
        "CVE-2026-54732",
        "GHSA-gmxc-r82q-347r"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/elwerene/libreoffice-convert",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "b78f17df9b9183bd503fc4635fc8b3df6705047b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.8.2"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "b78f17df9b9183bd503fc4635fc8b3df6705047b"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.8.2"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.8.1",
            "v1.8.0",
            "v1.7.0",
            "v1.6.1",
            "v1.6.0",
            "v1.5.1",
            "v1.5.0",
            "v1.4.1",
            "v1.4.0",
            "v1.3.8",
            "v1.3.7",
            "v1.3.6",
            "v1.3.5",
            "v1.3.4",
            "v1.3.3",
            "v1.3.2",
            "v1.3.1",
            "v1.3.0",
            "v1.2.0",
            "v1.1.2",
            "v1.1.1",
            "v1.1.0",
            "v1.0.5",
            "v1.0.4",
            "v0.0.4",
            "v1.0.3",
            "v1.0.2",
            "v1.0.1",
            "v1.0.0",
            "0.0.4",
            "v0.0.3"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54732.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:31.250565860Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54732.json",
        "https://github.com/elwerene/libreoffice-convert/security/advisories/GHSA-gmxc-r82q-347r",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54732",
        "https://github.com/elwerene/libreoffice-convert/commit/b78f17df9b9183bd503fc4635fc8b3df6705047b"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-22"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54732.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54732",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 498124,
  "published_at": "2026-08-27T17:21:50.743+00:00"
}