Arbitrary Code Injection Affecting weasyprint package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published16 Sept 2026
- disclosed18 Aug 2026
Introduced: 18 Aug 2026
CVE-2026-49452 (opens in a new tab)How to fix?
There is no fixed version for Echo:latest weasyprint.
NVD Description
Note: Versions mentioned in the description apply only to the upstream weasyprint package and not the weasyprint package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
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.
References
- https://advisory.echohq.com/cve/CVE-2026-49452
- https://github.com/Kozea/WeasyPrint/commit/e158264e33fa399b29f415d30719c1d85a55df1d
- 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