CVE-2026-49452

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Source
https://cve.org/CVERecord?id=CVE-2026-49452
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49452.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-49452
Aliases
Downstream
Related
Published
2026-08-18T17:59:36Z
Modified
2026-08-21T03:30:38Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N CVSS Calculator
Summary
WeasyPrint: CSS Injection via Presentational Hints
Details

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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-74"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/49xxx/CVE-2026-49452.json"
}
References

Affected packages

Git / github.com/kozea/weasyprint

Affected ranges

Type
GIT
Repo
https://github.com/kozea/weasyprint
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
e158264e33fa399b29f415d30719c1d85a55df1d
Fixed
32873118e8a70ceef87643775c247384d64798ea
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "69.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ]
}

Affected versions

v0.*
v0.1
v0.10
v0.11
v0.12
v0.13
v0.14
v0.15
v0.16
v0.17
v0.17.1
v0.18
v0.19
v0.19.1
v0.2
v0.20
v0.20.1
v0.24
v0.25
v0.26
v0.27
v0.28
v0.29
v0.30
v0.31
v0.32
v0.33
v0.34
v0.35
v0.36
v0.37
v0.38
v0.39
v0.40
v0.41
v0.42
v0.5
v0.6
v0.7
v0.8
v0.9
Other
v43
v43rc1
v43rc2
v44
v45
v46
v47
v48
v49
v50
v51
v53.*
v53.0
v53.0b1
v53.0b2
v54.*
v54.0
v54.0b1
v55.*
v55.0b1
v56.*
v56.0b1
v57.*
v57.0
v57.0b1
v57.1
v58.*
v58.0
v58.0b1
v58.1
v59.*
v59.0
v59.0b1
v60.*
v60.0
v60.1
v61.*
v61.0
v61.1
v62.*
v62.0
v62.1
v63.*
v63.0
v63.1
v64.*
v64.0
v64.1
v65.*
v65.0
v66.*
v66.0
v67.*
v67.0
v68.*
v68.0
v68.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-49452.json"