RansomLook up to 2.0.0 PDF Rendering server-side request forgery

Summaryinfo

A vulnerability described as critical has been identified in RansomLook up to 2.0.0. The affected element is an unknown function of the component PDF Rendering. The manipulation results in server-side request forgery. This vulnerability is identified as CVE-2026-78385. The attack can be executed remotely. There is not any exploit available.

Detailsinfo

A vulnerability classified as critical has been found in RansomLook up to 2.0.0. Affected is an unknown code block of the component PDF Rendering. The manipulation with an unknown input leads to a server-side request forgery vulnerability. CWE is classifying the issue as CWE-918. The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

RansomLook contains insufficient resource validation in the analysis PDF generation functionality. Analysis documents are converted from Markdown to HTML and passed to WeasyPrint for PDF rendering. Prior to the fix, WeasyPrint used its default URL fetcher, allowing resource references contained in an analysis to be resolved without restrictions. An authenticated attacker able to create or modify an analysis could embed crafted resource references using schemes such as file:// or http://. When the analysis was subsequently rendered as PDF, WeasyPrint would process these references with the privileges and network access of the RansomLook server. A malicious file:// reference could cause the renderer to access arbitrary files readable by the RansomLook process, potentially exposing sensitive configuration, credentials, or other local data through rendered resources. Network URLs could cause the server to initiate requests to localhost, internal network services, or external systems, resulting in server-side request forgery (SSRF) and potentially bypassing network-level access restrictions. The patch introduces a dedicated WeasyPrint URL fetcher that permits only data: resources, the RansomLook report logo, and files contained within the analysis asset directory. Network resources and filesystem paths outside these explicitly permitted locations are rejected.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-78385 since 08/24/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The technical details are unknown and an exploit is not available.

Applying the patch 34dc0285583dae483b4d48c8e98fff942b755f5f is able to eliminate this problem.

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Productinfo

Name

• RansomLook

Version

• 2.0

Website

• Product: https://github.com/RansomLook/RansomLook/

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