docling-project docling/docling-slim up to 2.131.x HTML image resource loader image_resource_loader.py headers cross-domain policy

Summaryinfo

A vulnerability, which was classified as problematic, was found in docling-project docling and docling-slim up to 2.131.x. This affects an unknown function of the file docling/backend/utils/image_resource_loader.py of the component HTML image resource loader. Such manipulation of the argument headers leads to cross-domain policy. This vulnerability is listed as CVE-2026-105742. The attack may be performed from remote. There is no available exploit. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in docling-project docling and docling-slim up to 2.131.x. It has been rated as problematic. Affected by this issue is some unknown functionality of the file docling/backend/utils/image_resource_loader.py of the component HTML image resource loader. The manipulation of the argument headers with an unknown input leads to a cross-domain policy vulnerability. Using CWE to declare the problem leads to CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. Impacted is confidentiality. CVE summarizes:

Docling simplifies document processing by parsing diverse formats and providing integrations with the generative AI ecosystem. From 2.95.0 until 2.132.0, the HTML image resource loader in docling/backend/utils/image_resource_loader.py forwards headers configured through the HTMLBackendOptions.headers setting to every remote image URL named by an untrusted document when enable_remote_fetch=True and fetch_images=True. The loader does not restrict those credentials to the source document's origin, allowing requests that carry custom headers such as API keys and cookies to follow cross-origin redirects and expose the caller's configured credentials to a document author. The default configuration is not affected because remote fetching and configured headers are required. This issue is fixed in 2.132.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-105742 since 10/05/2026. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 2.132.0 eliminates this vulnerability.

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Productinfo

Type

• Project Management Software

Vendor

• docling-project

Name

• docling
• docling-slim

Version

• 2.131

Website

• Product: https://github.com/docling-project/docling/

CPE 2.3info

• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒

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