CVE-2026-44020 Vulnerability Analysis & Exploit Details

CVE-2026-44020
Vulnerability Scoring

7.5
/10
Very High Risk

Highly exploitable, CVE-2026-44020 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-44020 Details

Status: Modified

Last updated: 🕓 28 Aug 2026, 16:18 UTC
Originally published on: 🕕 24 Jun 2026, 18:17 UTC

Time between publication and last update: 64 days

CVSS Release: version 3

CVSS3 Source

security-advisories@github.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2026-44020 Vulnerability Summary

CVE-2026-44020: 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.

Assessing the Risk of CVE-2026-44020

Access Complexity Graph

The exploitability of CVE-2026-44020 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-44020

With low attack complexity and no required privileges, CVE-2026-44020 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-44020, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-44020, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2026-44020 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2026-44020 poses no threat to data integrity.
  • Availability: High
    CVE-2026-44020 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2026-44020 References

External References

CWE Common Weakness Enumeration

CWE-611

CAPEC Common Attack Pattern Enumeration and Classification

  • Data Serialization External Entities Blowup CAPEC-221 This attack takes advantage of the entity replacement property of certain data serialization languages (e.g., XML, YAML, etc.) where the value of the replacement is a URI. A well-crafted file could have the entity refer to a URI that consumes a large amount of resources to create a denial of service condition. This can cause the system to either freeze, crash, or execute arbitrary code depending on the URI.

Vulnerable Configurations

  • cpe:2.3:a:docling:docling:2.13.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.13.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.14.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.14.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.15.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.15.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.15.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.15.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.16.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.16.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.17.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.17.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.18.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.18.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.19.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.19.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.20.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.20.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.21.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.21.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.22.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.22.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.23.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.23.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.23.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.23.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.24.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.24.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.25.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.25.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.25.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.25.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.25.2:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.25.2:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.26.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.26.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.27.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.27.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.28.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.28.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.28.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.28.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.28.2:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.28.2:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.28.3:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.28.3:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.28.4:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.28.4:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.29.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.29.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.30.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.30.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.31.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.31.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.31.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.31.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.31.2:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.31.2:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.32.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.32.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.33.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.33.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.34.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.34.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.35.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.35.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.36.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.36.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.36.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.36.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.37.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.37.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.38.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.38.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.38.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.38.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.39.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.39.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.40.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.40.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.41.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.41.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.42.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.42.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.42.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.42.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.42.2:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.42.2:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.43.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.43.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.44.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.44.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.45.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.45.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.46.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.46.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.47.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.47.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.47.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.47.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.48.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.48.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.49.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.49.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.50.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.50.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.51.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.51.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.52.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.52.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.53.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.53.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.54.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.54.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.55.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.55.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.55.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.55.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.56.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.56.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.56.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.56.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.57.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.57.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.58.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.58.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.59.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.59.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.60.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.60.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.60.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.60.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.61.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.61.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.61.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.61.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.61.2:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.61.2:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.62.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.62.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.63.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.63.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.64.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.64.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.64.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.64.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.65.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.65.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.66.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.66.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.67.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.67.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.68.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.68.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.69.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.69.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.69.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.69.1:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.70.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.70.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.71.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.71.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.72.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.72.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.73.0:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.73.0:*:*:*:*:python:*:*
  • cpe:2.3:a:docling:docling:2.73.1:*:*:*:*:python:*:*
    cpe:2.3:a:docling:docling:2.73.1:*:*:*:*:python:*:*

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