docling-project Docling up to 2.130.x Document Backend html_backend.py rowspan/colspan allocation of resources

Summaryinfo

A vulnerability described as problematic has been identified in docling-project Docling up to 2.130.x. The impacted element is an unknown function of the file docling/backend/html_backend.py of the component Document Backend. The manipulation of the argument rowspan/colspan results in allocation of resources. This vulnerability was named CVE-2026-105749. The attack may be performed from remote. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in docling-project Docling up to 2.130.x. Affected is an unknown code block of the file docling/backend/html_backend.py of the component Document Backend. The manipulation of the argument rowspan/colspan with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-105749 since 10/05/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1499 by the MITRE ATT&CK project.

Upgrading to version 2.131.0 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• docling-project

Name

• Docling

Version

• 2.130

Website

• Product: https://github.com/docling-project/docling/

CPE 2.3info

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CPE 2.2info

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