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Vulnerability · Published Oct 5, 2026 · Assigned by GitHub_M

CVE-2026-105747Docling: METS-GBS archive member limit enforced after full member enumeration (memory exhaustion during format detection)

Medium 4.3

In plain English

A medium-severity resource allocation without limits in docling from docling-project. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 23% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 77.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
PyPIdocling2.131.0GHSA-3cr3-8m4c-fpxw
PyPIdocling2.131.0PYSEC-2026-4194
PyPIdocling-slim2.131.0GHSA-3cr3-8m4c-fpxw
PyPIdocling-slim2.131.0PYSEC-2026-4209

Affected products (as reported)

VendorProductVersions
docling-project docling >= 2.45.0, < 2.131.0
docling-project docling-slim >= 2.45.0, < 2.131.0

Weakness: CWE-409, CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

References