# CVE-2026-78385: RansomLook insufficient resource validation in PDF generation

Source: https://junglewise.ai/threats/cve-2026-78385-ransomlook-insufficient-resource-validation-in-pdf-generation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-24. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-78385 · Severity: info · CVSS 6.5 · Published 2026-08-24

RansomLook is a ransomware tracking and analysis platform that generates PDF reports of security analysis. An authenticated user could embed malicious file:// or http:// links in analysis documents that would be resolved during PDF generation with the server's privileges and network access. This could expose sensitive files, credentials, or enable server-side request forgery attacks against internal services.

Technologies: [RansomLook](https://junglewise.ai/threats/technologies/ransomlook). Vendors: [RansomLook](https://junglewise.ai/threats/vendors/ransomlook).

## Quick answers

**Is CVE-2026-78385 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-78385 being exploited in the wild.

**How severe is CVE-2026-78385?** Informational severity, with a CVSS score of 6.5, published 24 August 2026.

**Which products and versions are affected?** RansomLook RansomLook.

**Is there a fix for CVE-2026-78385?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-78385 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-78385?** Check whether you run RansomLook. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a resource validation bypass in the PDF generation pipeline. RansomLook converts Markdown analysis documents to HTML and passes them to WeasyPrint for PDF rendering; prior to patching, WeasyPrint's default URL fetcher resolved all resource references without restriction. An authenticated attacker could inject crafted file:// references to read arbitrary files on the system or http:// references to perform SSRF attacks against localhost or internal networks, exploiting the server's network context and file permissions. The fix implements a custom WeasyPrint URL fetcher that whitelists only data: URIs, report logos, and files within the analysis asset directory, rejecting all other network and filesystem access.

## Affected products

- RansomLook RansomLook

## Timeline

- 2026-08-24: disclosed

## References

- [https://github.com/RansomLook/RansomLook/commit/34dc0285583dae483b4d48c8e98fff942b755f5f](https://github.com/RansomLook/RansomLook/commit/34dc0285583dae483b4d48c8e98fff942b755f5f)

## Related threats

- [RansomLook API key exposure in HTML source](https://junglewise.ai/threats/cve-2026-78555-ransomlook-api-key-exposure-in-html-source)
- [RansomLook insecure Flask session key file permissions](https://junglewise.ai/threats/cve-2026-78553-ransomlook-insecure-flask-session-key-file-permissions)
- [RansomLook authentication endpoint enumeration and DoS](https://junglewise.ai/threats/cve-2026-78551-ransomlook-authentication-endpoint-enumeration-and-dos)
- [RansomLook API information disclosure via unauthenticated location records](https://junglewise.ai/threats/cve-2026-78386-ransomlook-api-information-disclosure-via-unauthenticated)
- [RansomLook Redis glob pattern injection](https://junglewise.ai/threats/cve-2026-78378-ransomlook-redis-glob-pattern-injection)