UBUNTU-CVE-2026-55073

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Source
https://ubuntu.com/security/CVE-2026-55073
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55073.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-55073
Upstream
Published
2026-09-14T17:17:00Z
Modified
2026-09-16T14:01:43Z
Severity
  • 6.2 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

WeasyPrint helps web developers to create PDF documents. Prior to 70.0, server-side applications that configure a restrictive url_fetcher and pass attacker-influenced values to HTML.write_pdf() can have the restriction bypassed through the xmp_metadata or stylesheets options. In weasyprint/pdf/init.py, xmp_metadata calls select_source() without the document url_fetcher, allowing an accessible local file to be read and embedded verbatim in the output PDF. In weasyprint/document.py, stylesheets constructs CSS() without the document url_fetcher, allowing local or internal resource loading and propagating the permissive fetcher through nested CSS imports and url() references. The stylesheets channel applies fetched resources but does not by itself disclose stylesheet comments verbatim. This issue is fixed in version 70.0.

References

Affected packages

Ubuntu:20.04:LTS / weasyprint

Package

Name
weasyprint
Purl
pkg:deb/ubuntu/weasyprint?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

Other
50-2
51-1
51-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "weasyprint",
            "binary_version": "51-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55073.json"

Ubuntu:22.04:LTS / weasyprint

Package

Name
weasyprint
Purl
pkg:deb/ubuntu/weasyprint?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

Other
51-2
51-3
53.*
53.4-1
54.*
54.0-1
54.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "weasyprint",
            "binary_version": "54.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55073.json"

Ubuntu:24.04:LTS / weasyprint

Package

Name
weasyprint
Purl
pkg:deb/ubuntu/weasyprint?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

59.*
59.0-1
60.*
60.2-1
61.*
61.0-1
61.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "weasyprint",
            "binary_version": "61.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55073.json"

Ubuntu:26.04:LTS / weasyprint

Package

Name
weasyprint
Purl
pkg:deb/ubuntu/weasyprint?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

62.*
62.3-1
62.3-1build1
67.*
67.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "weasyprint",
            "binary_version": "67.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-55073.json"