CVE-2026-55073
mediumWeasyPrint helps web developers to create PDF documents.
WeasyPrint helps web developers to create PDF documents. Prior to 70.0, server-side applications that configure a restrictive url_fetcher and pass attacker-influenced values to HTML.write_pdf() can have the restriction bypassed through the xmp_metadata or stylesheets options. In weasyprint/pdf/init.py, xmp_metadata calls select_source() without the document url_fetcher, allowing an accessible local file to be read and embedded verbatim in the output PDF. In weasyprint/document.py, stylesheets constructs CSS() without the document url_fetcher, allowing local or internal resource loading and propagating the permissive fetcher through nested CSS imports and url() references. The stylesheets channel applies fetched resources but does not by itself disclose stylesheet comments verbatim. This issue is fixed in version 70.0.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/Kozea/WeasyPrint/commit/289e278439b017cd9263b4cd4727026987f86443 security-advisories@github.com
- https://github.com/Kozea/WeasyPrint/releases/tag/v70.0 security-advisories@github.com
- https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jf6q-chmf-3h3v security-advisories@github.com
- https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jf6q-chmf-3h3v 134c704f-9b21-4f2e-91b3-4a467353bcc0