{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "1.28.2"
              }
            ],
            "source": [
              "DESCRIPTION",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "12786d12b2962a1d77fd13b103162eddf749644c"
            },
            {
              "fixed": "b2c8f3a859fed35c379a44df566f770dc3e18605"
            }
          ],
          "repo": "https://github.com/pymupdf/pymupdf",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
      "CWE-22"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82035.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "last_affected": "1.8.2"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "PyMuPDF through 1.28.2, fixed in commit b2c8f3a, contains a path traversal vulnerability in the font branch of extract_objects() in src/__main__.py, where the output filename is constructed by joining a document-controlled BaseFont name directly onto the user-supplied output directory without stripping path separators or dot-dot sequences. Attackers can supply a crafted PDF, EPUB, XPS, or FB2 file with a BaseFont name containing encoded path separators that decode to ../ sequences or absolute paths, causing arbitrary file writes outside the intended output directory without requiring authentication or elevated privileges.",
  "id": "CVE-2026-82035",
  "modified": "2026-09-16T03:30:29.166564832Z",
  "published": "2026-09-14T18:38:34.837Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/82xxx/CVE-2026-82035.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-82035"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.vulncheck.com/advisories/pymupdf-path-traversal-via-extract-objects-font-branch"
    },
    {
      "type": "FIX",
      "url": "https://github.com/pymupdf/PyMuPDF/commit/b2c8f3a859fed35c379a44df566f770dc3e18605"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/pymupdf/PyMuPDF"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "PyMuPDF 1.28.2 Path Traversal via extract_objects() Font Branch"
}