Medium 6.5Published Aug 18, 2026

CVE-2026-49452WeasyPrint: CSS Injection via Presentational Hints

Updated under an hour ago (2026-10-19 07:10 UTC)

Does this affect you?

It affects Kozea WeasyPrint. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Kozea WeasyPrint

Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-74
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Kozea WeasyPrint kozea:weasyprint (from the name)	before 69.0	CNA record

References

https://github.com/Kozea/WeasyPrint/security/advisories/GHSA-jhhc-3hcp-qhm5x-refsource-confirm
https://github.com/Kozea/WeasyPrint/pull/2773x-refsource-misc
https://github.com/Kozea/WeasyPrint/commit/e158264e33fa399b29f415d30719c1d85a55df1dx-refsource-misc
https://github.com/Kozea/WeasyPrint/releases/tag/v69.0x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.