要点
- CVE-2026-44018 は docling, docling (docling) に影響する深刻度「高」 (CVSS 7.1) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.16%（全脆弱性の 5.3% より高い）。
- 対処：2.91.0 以降に更新してください。
| パッケージ | 影響を受けるバージョン | 修正済みバージョン |
|---|
| docling PyPI | ≥ 2.45.0, < 2.91.0
| 2.91.0
|
| docling | ≥ 2.45.0, < 2.91.0
| 2.91.0
|
概要
Impact
The METS-GBS backend's XML parsing and the input document format detection lacked security controls, enabling:
- XML External Entity (XXE) attacks to read local files or cause denial of service
- Decompression bombs (zip bombs) to exhaust memory and disk space
- Unbounded archive extraction consuming system resources
An attacker could craft malicious METS-GBS archives that, when processed, could read sensitive files, exhaust system resources, or cause application crashes.
Patches
Fixed in version 2.91.0. The fix implements:
- Secure XML parsing with
resolve_entities=False, load_dtd=False, and no_network=True
- Configurable limits: 300 MB total extraction size, 10 MB per file, 1000 member count
- Cumulative size tracking across all extractions
- Early termination when limits are exceeded
- Secure format detection of METS-GBS tar archives with
_detect_mets_gbs() method: maximum file size (10 MB per file), maximum member count (1000 members), and exception handling to gracefully fail when limits are exceeded
Workarounds
Avoid processing METS-GBS archives from untrusted sources. If necessary, pre-validate archives in an isolated environment with resource limits.
References
NVD の説明
Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.45.0 until 2.91.0, the METS-GBS backend's XML parsing and the input document format detection lacked security controls. An attacker could craft malicious METS-GBS archives that, when processed, could read sensitive files, exhaust system resources, or cause application crashes. This vulnerability is fixed in 2.91.0.
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