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  4. CVE 2026 49452 weasyprint css injection via presentational hints
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Back to active CVEs
Medium · CVSS 6.5CVE-2026-49452GHSA-JHHC-3HCP-QHM5

WeasyPrint: CSS Injection via Presentational Hints

Answer in brief

CVE-2026-49452 records a Medium severity (CVSS 6.5) vulnerability in WeasyPrint: CSS Injection via Presentational Hints. The current sources do not mark it as known exploited. The current feed maps Kozea/WeasyPrint (generic), weasyprint (pip). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 18, 2026Updated Sep 18, 2026Source checked Oct 2, 2026First seen by HOL Jul 6, 2026Material review Sep 18, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Kozea/WeasyPrint (generic), weasyprint (pip). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Kozea/WeasyPrintgeneric<69.069.0
weasyprintpip<=68.1Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Kozea/WeasyPrint, weasyprint.
  2. 2Review the reported fix. Update Kozea/WeasyPrint to 69.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Aug 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Jul 6, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • All in One SEO < 5.0.2.1 - Unauthenticated Arbitrary Shortcode Execution via Search QueryAlso CWE-74
  • CodeArt Google MP3 Audio Player 1.0.11 Arbitrary File Read via direct_download.phpSame generic ecosystem
  • Weaver e-Bridge Unauthenticated Arbitrary File Read via saveYZJFileSame generic ecosystem
  • H3C CVM Unauthenticated File Upload via fileUpload/upload TokenSame generic ecosystem
  • LimeSurvey Community Edition 7.4.0 - Stored XSS through the Date/Time date_min question attributeSame generic ecosystem
  • Apache Traffic Server: SNI to Host header matching policy is not properly enforcedSame generic ecosystem

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-74
Source
CVE List V5
Source checked
Oct 2, 2026
References
5 linked sources
Open source record