Arbitrary File Write via Archive Extraction (Zip Slip) Affecting docling package, versions [,2.91.0)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-DOCLING-17151751
- published4 Jun 2026
- disclosed3 Jun 2026
- creditUnknown
Introduced: 3 Jun 2026
NewCVE-2026-44017 (opens in a new tab)How to fix?
Upgrade docling to version 2.91.0 or higher.
Overview
docling is a SDK and CLI for parsing PDF, DOCX, HTML, and more, to a unified document representation for powering downstream workflows such as gen AI applications.
Affected versions of this package are vulnerable to Arbitrary File Write via Archive Extraction (Zip Slip) in easyocr_model.py process. An attacker who can control the model download source or intercept the download process can overwrite arbitrary files on the file system by supplying a malicious ZIP archive containing malicious member paths. This can lead to execution of arbitrary code, persistent backdoors, or system compromise.
Details
It is exploited using a specially crafted zip archive, that holds path traversal filenames. When exploited, a filename in a malicious archive is concatenated to the target extraction directory, which results in the final path ending up outside of the target folder. For instance, a zip may hold a file with a "../../file.exe" location and thus break out of the target folder. If an executable or a configuration file is overwritten with a file containing malicious code, the problem can turn into an arbitrary code execution issue quite easily.
The following is an example of a zip archive with one benign file and one malicious file. Extracting the malicous file will result in traversing out of the target folder, ending up in /root/.ssh/ overwriting the authorized_keys file:
+2018-04-15 22:04:29 ..... 19 19 good.txt
+2018-04-15 22:04:42 ..... 20 20 ../../../../../../root/.ssh/authorized_keys