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CVE-2025-68616

HighPublished

WeasyPrint Vulnerable to Server-Side Request Forgery (SSRF) Protection Bypass via HTTP Redirect

Published: Jan 19, 2026
Updated: Jul 15, 2026
Assigning CNA: GitHub_M
Evidence observed: Aug 17, 2026

Primary CVSS

7.5/ 10High

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS probability estimate

0.7%

Low · next 30 days

Percentile: 51.8%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

WeasyPrint helps web developers to create PDF documents. Prior to version 68.0, a server-side request forgery (SSRF) protection bypass exists in WeasyPrint's `default_url_fetcher`. The vulnerability allows attackers to access internal network resources (such as `localhost` services or cloud metadata endpoints) even when a developer has implemented a custom `url_fetcher` to block such access. This occurs because the underlying `urllib` library follows HTTP redirects automatically without re-validating the new destination against the developer's security policy. Version 68.0 contains a patch for the issue.

Sources

CVE-2025-68616-Detecting-and-Patching-an-SSRF-in-WeasyPrint-with-WazuhResearch
Hands-on vulnerability management case study: how Wazuh flagged a real SSRF (CVE-2025-68616) in WeasyPrint, and how I reproduced and patched it.

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