CVE-2026-105749: docling DoS — Exploit & Fix

Description

Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.0.0 until 2.131.0, the HTML, JATS, OpenDocument spreadsheet, and BoxNote backends, including docling/backend/html_backend.py, docling/backend/jats_backend.py, and docling/backend/boxnote_backend.py, accept the rowspan and colspan attribute values without an upper bound and execute loops or allocate a table grid proportional to the declared span. A very small document can therefore cause sustained CPU use or multi-gigabyte memory allocation, and the document_timeout setting does not interrupt the single backend conversion call. Export through the TableData.grid property can further materialize the oversized grid. This issue is fixed in 2.131.0.

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CVSS v3.1 Score

6.5

MEDIUM

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

EPSS — Exploit Prediction

0.0029

Probability of exploitation

0.22%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-400 Uncontrolled Resource Consumption

CWE-789 CWE-789

Affected Products

Vendor	Product	Versions
docling	docling	2.0.0 — 2.131.0

References

Advisories & Patches

https://github.com/docling-project/docling/commit/c5b4429cc6500a344c13edeb22e67610c2159b09 https://github.com/docling-project/docling/pull/4414 https://github.com/docling-project/docling/security/advisories/GHSA-cgc7-9qp3-86m3 https://github.com/docling-project/docling/security/advisories/GHSA-cgc7-9qp3-86m3

Exploits

https://github.com/docling-project/docling/security/advisories/GHSA-cgc7-9qp3-86m3 https://github.com/docling-project/docling/security/advisories/GHSA-cgc7-9qp3-86m3

Other References

https://github.com/docling-project/docling/releases/tag/v2.131.0

Frequently Asked Questions

What is CVE-2026-105749? +

Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.0.0 until 2.131.0, the HTML, JATS, OpenDocument spreadsheet, and BoxNote backends, including docling/backend/html_backend.py, docling/backend/jats_backend.py, and docling/backend/boxnote_backend.py, accept the rowspan and colspan attribute values without an upper bound and execute loops or allocate a table grid proportional to the declared span. A very small document can therefore cause sustained CPU use or multi-gigabyte memory allocation, and the document_timeout setting does not interrupt the single backend conversion call. Export through the TableData.grid property can further materialize the oversized grid. This issue is fixed in 2.131.0. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-105749? +

CVE-2026-105749 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0029, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-105749? +

CVE-2026-105749 affects products from docling, specifically: docling. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-105749? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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