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Vulnerability record · CVE-2026-44020 · published 24 June 2026

CVE-2026-44020: Docling xml external entity (xxe) vulnerability

Docling · Docling

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.

7.5 CVSS 3.1 High EPSS 0.60% · top 53.4% CWE-776 · CWE-776CWE-611 · XML external entity (XXE)
7.5CVSS 3.1 base score
0.60%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
28 Aug 2026Last modified by NVD

Description

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/docling-project/docling/security/advisories/GHSA-m88r-rg27-5xfg MitigationPatchVendor Advisory
https://access.redhat.com/errata/RHSA-2026:60520
https://access.redhat.com/security/cve/CVE-2026-44020
https://bugzilla.redhat.com/show_bug.cgi?id=2492456
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44020.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.2CVE-2026-44016Docling code injection vulnerabilityDocling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. FIn versions >= 2.82.0…EPSS 0.59%7.5CVE-2026-44017Docling path traversal vulnerabilityDocling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. Prior to 2.91.0, the E…EPSS 0.71%7.1CVE-2026-47214Docling uncontrolled resource consumption vulnerabilityDocling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. Prior to 2.94.0, the H…EPSS 0.37%7.1CVE-2026-44018Docling xml external entity (xxe) vulnerabilityDocling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.45.0 until 2.91…EPSS 0.16%5.5CVE-2026-44022Docling path traversal vulnerabilityDocling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.73.0 until 2.91…EPSS 0.21%

Source: NIST National Vulnerability Database (record CVE-2026-44020), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.