{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-44020: Docling: Unsafe XML Entity Expansion in USPTO Patent Backend","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-44020","status":"final","version":"1","initial_release_date":"2026-06-24T17:45:46.644Z","current_release_date":"2026-06-30T03:19:04.523Z","revision_history":[{"date":"2026-06-24T17:45:46.644Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.13.0 until 2.74.0, the 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 read arbitrary files from the server filesystem, perform Server-Side Request Forgery (SSRF) attacks, or cause denial of service through entity expansion (Billion Laughs attack). The vulnerability affects three USPTO patent format parsers: ICE (v4.x), Grant v2.5, and Application v1.x. This vulnerability is fixed in 2.74.0.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-44020 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-44020"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-44020"},{"category":"external","summary":"https://github.com/docling-project/docling/security/advisories/GHSA-m88r-rg27-5xfg","url":"https://github.com/docling-project/docling/security/advisories/GHSA-m88r-rg27-5xfg"}]},"product_tree":{"branches":[{"category":"vendor","name":"docling-project","branches":[{"category":"product_name","name":"docling","branches":[{"category":"product_version","name":">= 2.13.0, < 2.74.0","product":{"name":"docling-project docling >= 2.13.0, < 2.74.0","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:docling-project:docling:\\>\\=_2.13.0\\,_\\<_2.74.0:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-44020","title":"Docling: Unsafe XML Entity Expansion in USPTO Patent Backend","notes":[{"category":"description","text":"Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.13.0 until 2.74.0, the 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 read arbitrary files from the server filesystem, perform Server-Side Request Forgery (SSRF) attacks, or cause denial of service through entity expansion (Billion Laughs attack). The vulnerability affects three USPTO patent format parsers: ICE (v4.x), Grant v2.5, and Application v1.x. This vulnerability is fixed in 2.74.0.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H","baseScore":9.4,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1"]}],"remediations":[{"category":"none_available","details":"No fixed version is published yet. Monitor the upstream advisory.","product_ids":["CSAFPID-1"]}]}]}