Is CVE-2026-49452 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-49452?

CVE-2026-49452 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-49452

Description

WeasyPrint helps web developers to create PDF documents. Prior to 69.0, WeasyPrint embeds unescaped HTML presentational-hint attribute values into CSS in weasyprint/css/__init__.py when presentational_hints=True. The background attribute is inserted into a background-image:url() declaration and parsed by tinycss2.parse_blocks_contents(), allowing untrusted HTML to inject additional CSS declarations. Applications that render untrusted HTML with presentational hints enabled can be affected by CSS injection and server-side requests through injected url() values. This issue is fixed in version 69.0.