{"id":"GHSA-m88r-rg27-5xfg","summary":"Docling: Unsafe XML Entity Expansion in USPTO Patent Backend","details":"### Impact\nThe USPTO patent XML parser used the standard `xml.sax.parseString()` without protection against XML External Entity (XXE) attacks. An attacker could craft malicious USPTO patent XML files with external entity references that could:\n- Read arbitrary files from the server filesystem\n- Perform Server-Side Request Forgery (SSRF) attacks\n- Cause denial of service through entity expansion (Billion Laughs attack)\n\nThe vulnerability affects three USPTO patent format parsers: ICE (v4.x), Grant v2.5, and Application v1.x.\n\n### Patches\nFixed in version 2.74.0. The parser now uses `defusedxml.sax.make_parser()` with secure configuration that blocks external entity resolution (`feature_external_ges=False`, `feature_external_pes=False`) while allowing DTD declarations required by USPTO files. This prevents XXE attacks while maintaining compatibility with the USPTO XML format.\n\n### Workarounds\nAvoid processing USPTO patent XML files from untrusted sources. Implement resource limits (memory, CPU time) when processing patent documents.\n\n### References\n- Fix release: [v2.74.0](https://github.com/docling-project/docling/releases/tag/v2.74.0)","aliases":["CVE-2026-44020","PYSEC-2026-240"],"modified":"2026-06-27T11:26:26.771789265Z","published":"2026-06-03T21:14:15Z","database_specific":{"nvd_published_at":null,"github_reviewed_at":"2026-06-03T21:14:15Z","cwe_ids":["CWE-776"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/docling-project/docling/security/advisories/GHSA-m88r-rg27-5xfg"},{"type":"PACKAGE","url":"https://github.com/docling-project/docling"},{"type":"WEB","url":"https://github.com/docling-project/docling/releases/tag/v2.74.0"}],"affected":[{"package":{"name":"docling","ecosystem":"PyPI","purl":"pkg:pypi/docling"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.13.0"},{"fixed":"2.74.0"}]}],"versions":["2.13.0","2.14.0","2.15.0","2.15.1","2.16.0","2.17.0","2.18.0","2.19.0","2.20.0","2.21.0","2.22.0","2.23.0","2.23.1","2.24.0","2.25.0","2.25.1","2.25.2","2.26.0","2.27.0","2.28.0","2.28.1","2.28.2","2.28.3","2.28.4","2.29.0","2.30.0","2.31.0","2.31.1","2.31.2","2.32.0","2.33.0","2.34.0","2.35.0","2.36.0","2.36.1","2.37.0","2.38.0","2.38.1","2.39.0","2.40.0","2.41.0","2.42.0","2.42.1","2.42.2","2.43.0","2.44.0","2.45.0","2.46.0","2.47.0","2.47.1","2.48.0","2.49.0","2.50.0","2.51.0","2.52.0","2.53.0","2.54.0","2.55.0","2.55.1","2.56.0","2.56.1","2.57.0","2.58.0","2.59.0","2.60.0","2.60.1","2.61.0","2.61.1","2.61.2","2.62.0","2.63.0","2.64.0","2.64.1","2.65.0","2.66.0","2.67.0","2.68.0","2.69.0","2.69.1","2.70.0","2.71.0","2.72.0","2.73.0","2.73.1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-m88r-rg27-5xfg/GHSA-m88r-rg27-5xfg.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}