CVE-2026-105747 Docling: METS-GBS archive member limit enforced after full member enumeration (memory exhaustion during format detection)
Attackers can cause memory exhaustion and denial of service by submitting crafted METS-GBS archives to Docling before member limits are enforced.
- 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-2026-105747?
CVE-2026-105747 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 2.45.0 until 2.131.0, METS-GBS format detection in docling/datamodel/document.py and the backend in docling/backend/mets_gbs_backend.py call tarfile.TarFile.getmembers() before enforcing the max_member_count limit, causing the full archive member list to be allocated before the limit can stop processing. A small gzip-compressed tar archive with a very large number of empty members can therefore consume memory proportional to the declared member count, including during format detection before the allowed_formats restriction is applied. This issue is a residual weakness in the member-count protection added for CVE-2026-44018. This issue is fixed in 2.131.0.
Which versions are affected by CVE-2026-105747?
6 open source packages ship an affected version, including docling and docling-slim. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
docling PyPI | From 2.45.0 | 2.131.0 |
docling PyPI | From 2.45.0 | 2.131.0 |
docling PyPI | From 2.45.0 | 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-2026-105747?
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-2026-105747 being exploited?
There is no known exploitation of CVE-2026-105747 in the wild and no public exploit code.
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-3cr3-8m4c-fpxw, PYSEC-2026-4194, PYSEC-2026-4209.