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Details of issue NIXPKGS-2026-0059

NIXPKGS-2026-0059
published on 20 Jan 2026
updated 2 days, 13 hours ago by @LeSuisse Activity log
  • Created automatic suggestion
  • @LeSuisse removed
    2 packages
    • python312Packages.django-weasyprint
    • python313Packages.django-weasyprint
  • @LeSuisse accepted as draft
  • @LeSuisse published on GitHub
WeasyPrint Vulnerable to Server-Side Request Forgery (SSRF) Protection Bypass via HTTP Redirect

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.

Affected products

WeasyPrint
  • ==< 68.0

Matching in nixpkgs

pkgs.python312Packages.weasyprint

Converts web documents to PDF

pkgs.python313Packages.weasyprint

Converts web documents to PDF

Package maintainers: 3