Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') Affecting docling package, versions [0,2.91.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-DOCLING-16757932
- published19 May 2026
- disclosed11 May 2026
- creditUnknown
Introduced: 11 May 2026
NewCVE-2026-31248 (opens in a new tab)How to fix?
Upgrade docling to version 2.91.0 or higher.
Overview
docling is a SDK and CLI for parsing PDF, DOCX, HTML, and more, to a unified document representation for powering downstream workflows such as gen AI applications.
Affected versions of this package are vulnerable to Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion') through the etree.fromstring function. An attacker can cause excessive resource consumption by submitting a specially crafted XML file with nested entity definitions inside a .tar.gz archive, which, when processed, triggers exponential entity expansion during XML parsing.