---
id: CVE-2026-49452
title: WeasyPrint helps web developers to create PDF documents
summary: >-
  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…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-74
vendor: weasyprint
product: weasyprint
affected:
  - weasyprint <= 68.1
published: '2026-08-18'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T20:09:01.757'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-49452'
references:
  - url: >-
      https://github.com/Kozea/WeasyPrint/commit/e158264e33fa399b29f415d30719c1d85a55df1d
    label: security-advisories@github.com
  - url: 'https://github.com/Kozea/WeasyPrint/pull/2773'
    label: security-advisories@github.com
  - url: 'https://github.com/Kozea/WeasyPrint/releases/tag/v69.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jhhc-3hcp-qhm5
    label: security-advisories@github.com
  - url: >-
      https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jhhc-3hcp-qhm5
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-jhhc-3hcp-qhm5'
tags:
  - nvd
  - ghsa
  - pip
epss: 0.00372
epssPercentile: 0.28382
aliases:
  - GHSA-jhhc-3hcp-qhm5
ecosystem: pip
ingestedAt: '2026-07-06T17:44:51.399Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-49452)

Affected packages:

- `weasyprint <= 68.1`

Source: https://github.com/advisories/GHSA-jhhc-3hcp-qhm5