PT-2026-59123 · Pypi · Docling

Published 2026-07-13 · Updated 2026-07-13

OSV

CVSS v3.1

7.5

High

Base vector

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

Docling's METS GBS backend is vulnerable to XML Entity Expansion (XXE) attacks thru 2.61.0. The backend extracts and validates XML files from .tar.gz archives using etree.fromstring() without disabling entity resolution. An attacker can craft a malicious XML file with nested entity definitions (XML Bomb) and package it into a .tar.gz archive. When processed by Docling, the exponential expansion of entities during XML parsing leads to excessive resource consumption, resulting in a denial of service (DoS) condition on the system running the Docling parser.

Fix

Related Identifiers

PYSEC-2026-2454

Affected Products

Docling

References · 6

• https://nvd.nist.gov/vuln/detail/CVE-2026-31248 · Security Note
• https://osv.dev/vulnerability/PYSEC-2026-2454 · Vendor Advisory
• https://github.com/docling-project/docling · Note
• https://github.com/advisories/GHSA-9f4q-q82q-4359 · Note
• https://pypi.org/project/docling · Note
• https://notion.so/CVE-2026-31248-35d1e1393188818585b2ce3b9ce24686 · Note