CVE-2026-105749 Docling: Unbounded table rowspan/colspan in HTML, JATS, ODS and BoxNote backends causes CPU/memory exhaustion
Attackers can cause CPU and memory exhaustion in Docling by submitting documents with unbounded table spans, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-105749?
CVE-2026-105749 is a medium-severity denial of service vulnerability in docling-project docling, published on 5 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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.
Which versions are affected by CVE-2026-105749?
6 open source packages ship an affected version, including docling and docling-slim. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
docling PyPI | From 2.0.0 | 2.131.0 |
docling PyPI | From 2.0.0 | 2.131.0 |
docling PyPI | From 2.0.0 | 2.131.0 |
docling-slim PyPI | From 2.92.0 | 2.131.0 |
docling-slim PyPI | From 2.92.0 | 2.131.0 |
docling-slim PyPI | From 2.92.0 | 2.131.0 |
Products include Docling Docling.
How do I fix CVE-2026-105749?
Upgrade docling to 2.131.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-105749 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-105749 exists.
Other vulnerabilities in docling-project docling
- CVE-2026-44016 Docling: Unsafe Playwright-based HTML Rendering
- CVE-2026-105744 Docling has arbitrary file read/write (and command execution when shell-escape is enabled) when rendering untrusted TikZ with the opt-in Tectonic engine
- CVE-2026-44017 Docling: Unsafe Zip Extraction in EasyOCR Model Download
- CVE-2026-44020 Docling: Unsafe XML Entity Expansion in USPTO Patent Backend
- CVE-2026-47214 Docling: Unsafe URI and Path Handling in HTML Backend
Sources
Also known as GHSA-cgc7-9qp3-86m3, PYSEC-2026-4195, PYSEC-2026-4211.