CVE-2026-105749: Docling unbounded table span allocation denial of service

CVE-2026-105749 · Severity: medium · CVSS 6.5 · Published 2026-10-05

Docling is a document processing library that parses diverse file formats and integrates with generative AI. Versions 2.0.0 through 2.130.0 are vulnerable to a denial-of-service attack where an attacker can craft a small malicious document containing tables with extremely large rowspan and colspan attributes. When processing such a document, Docling will allocate memory or consume CPU proportional to these declared spans rather than the actual table size, potentially consuming gigabytes of memory or causing the application to hang.

Technologies: Docling Project Docling, docling (PyPI), docling-slim (PyPI). Vendors: Docling Project, PyPI.

Quick answers

Is CVE-2026-105749 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-105749 being exploited in the wild.
How severe is CVE-2026-105749?
Medium severity, with a CVSS score of 6.5, published 5 October 2026.
Which products and versions are affected?
Docling Project Docling 2.0.0 through 2.130.0; docling (PyPI) >= 2.0.0, < 2.131.0, ECOSYSTEM:introduced=2.0.0,fixed=2.131.0; docling-slim (PyPI) >= 2.92.0, < 2.131.0, ECOSYSTEM:introduced=2.92.0,fixed=2.131.0.
Is there a fix for CVE-2026-105749?
Yes. docling (PyPI): upgrade to 2.131.0 or later; docling-slim (PyPI): upgrade to 2.131.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-105749 attacked?
It is attacked over the network.
Am I affected by CVE-2026-105749?
Check whether you run Docling Project Docling, docling (PyPI) or docling-slim (PyPI) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • docling (PyPI): upgrade to 2.131.0 or later
    pip install "docling>=2.131.0"
  • docling-slim (PyPI): upgrade to 2.131.0 or later
    pip install "docling-slim>=2.131.0"

Technical details

The HTML, JATS, OpenDocument, and BoxNote backends in Docling accept unbounded rowspan and colspan attribute values and use them directly to size table grids and allocate loops, allowing an attacker to declare spans far larger than the actual table dimensions. An attacker-controlled document with a small payload can trigger multi-gigabyte memory allocation or sustained CPU use; the document_timeout setting does not interrupt the backend conversion call itself. The fix clamps span values to reasonable limits and derives grid size from actual table content.

Affected products

  • Docling Project Docling 2.0.0 through 2.130.0

Identifiers

  • CVE-2026-105749
  • GHSA-cgc7-9qp3-86m3
  • PYSEC-2026-4195
  • PYSEC-2026-4211

Timeline

  • 2026-10-05: disclosed
  • 2026-09-29: patched

References

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