Insertion of Sensitive Information Into Sent Data Affecting docling-slim package, versions [2.95.0,2.132.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
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-DOCLINGSLIM-20537227
- published6 Oct 2026
- disclosed5 Oct 2026
- creditJeff Witt
Introduced: 5 Oct 2026
NewCVE-2026-105742 (opens in a new tab)How to fix?
Upgrade docling-slim to version 2.132.0 or higher.
Overview
docling-slim is a Modular version of the Docling package: 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 Insertion of Sensitive Information Into Sent Data via the HTML backend's remote fetch logic in html_backend.py when remote fetching is enabled. An attacker who controls a document URL can supply a URL that resolves to an internal or loopback address (including IPv4-mapped IPv6 addresses), cause the backend to follow redirects to arbitrary hosts without re-validating each hop, and leak responses to the attacker. Additionally, configured HTMLBackendOptions.headers (which may contain credentials or tokens) are forwarded to any origin reached during redirects rather than being scoped to the source document's origin.
Note: This is only exploitable when remote fetching is enabled and HTMLBackendOptions.headers are configured; the default configuration is not affected.