---
id: CVE-2026-31247
aliases:
  - GHSA-cr42-rg2m-mq4q
  - PYSEC-2026-2455
title: Docling's JATS XML backend is vulnerable to XML Entity Expansion (XXE) attacks
summary: Docling's JATS XML backend is vulnerable to XML Entity Expansion (XXE) attacks
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
vendor: docling
product: docling
ecosystem: pip
affected:
  - docling <= 2.61.0
published: '2026-05-11'
updated: '2026-07-13'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-cr42-rg2m-mq4q'
references:
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-31247'
  - url: 'https://github.com/docling-project/docling'
  - url: 'https://www.notion.so/CVE-2026-31247-35d1e1393188818fa654c116c6a470bb'
tags:
  - osv
  - pip
epss: 0.00488
epssPercentile: 0.39341
ingestedAt: '2026-07-13T18:57:56.813Z'
---

## Overview

Docling's JATS XML backend is vulnerable to XML Entity Expansion (XXE) attacks thru 2.61.0. The backend uses etree.parse() to parse XML files without disabling entity resolution. An attacker can craft a malicious XML file containing a nested entity expansion payload (XML Bomb). When processed by Docling, the exponential expansion of entities leads to excessive resource consumption, resulting in a denial of service (DoS) condition on the system running the Docling parser.

## Affected packages

- `docling <= 2.61.0`

## Remediation

Refer to the advisory for the patched release.