CVE-2026-49452
MEDIUM
6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: none
Description
AI Translation Available
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.
74
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
IncompleteCommon Consequences
Security Scopes Affected:
Confidentiality
Access Control
Other
Integrity
Non-Repudiation
Potential Impacts:
Read Application Data
Bypass Protection Mechanism
Alter Execution Logic
Other
Hide Activities
Applicable Platforms
All platforms may be affected
https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jhhc-3hcp-qhm5
https://github.com/Kozea/WeasyPrint/commit/e158264e33fa399b29f415d30719c1d85a55…
https://github.com/Kozea/WeasyPrint/pull/2773
https://github.com/Kozea/WeasyPrint/releases/tag/v69.0
https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jhhc-3hcp-qhm5