UBUNTU-CVE-2026-44312

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Source
https://ubuntu.com/security/CVE-2026-44312
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44312.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-44312
Upstream
  • CVE-2026-44312
Published
2026-05-14T17:16:00Z
Modified
2026-05-20T22:02:56.233130223Z
Severity
  • 5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

cssparser is a Ruby CSS parser. Prior to 2.1.0 and 1.22.0, the CSS Parser gem does not validate HTTPS connections, allowing a Man-in-the-Middle (MITM) attacker to inject or modify CSS content when stylesheets are loaded via HTTPS. The connection is established with OpenSSL::SSL::VERIFYNONE, meaning any HTTPS certificate—even entirely untrusted—will be accepted without validation. This vulnerability is fixed in 2.1.0 and 1.22.0.

References

Affected packages

Ubuntu:16.04:LTS
ruby-css-parser

Package

Name
ruby-css-parser
Purl
pkg:deb/ubuntu/ruby-css-parser?arch=source&distro=xenial

Affected ranges

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

Affected versions

1.*
1.3.6-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.3.6-1",
            "binary_name": "ruby-css-parser"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44312.json"
Ubuntu:18.04:LTS
ruby-css-parser

Package

Name
ruby-css-parser
Purl
pkg:deb/ubuntu/ruby-css-parser?arch=source&distro=bionic

Affected ranges

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

Affected versions

1.*
1.3.6-1
1.6.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.0-1",
            "binary_name": "ruby-css-parser"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44312.json"
Ubuntu:20.04:LTS
ruby-css-parser

Package

Name
ruby-css-parser
Purl
pkg:deb/ubuntu/ruby-css-parser?arch=source&distro=focal

Affected ranges

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

Affected versions

1.*
1.6.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.0-1",
            "binary_name": "ruby-css-parser"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44312.json"
Ubuntu:22.04:LTS
ruby-css-parser

Package

Name
ruby-css-parser
Purl
pkg:deb/ubuntu/ruby-css-parser?arch=source&distro=jammy

Affected ranges

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

Affected versions

1.*
1.6.0-1
1.6.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.0-2",
            "binary_name": "ruby-css-parser"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44312.json"
Ubuntu:24.04:LTS
ruby-css-parser

Package

Name
ruby-css-parser
Purl
pkg:deb/ubuntu/ruby-css-parser?arch=source&distro=noble

Affected ranges

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

Affected versions

1.*
1.6.0-2
1.16.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.16.0-1",
            "binary_name": "ruby-css-parser"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44312.json"
Ubuntu:25.10
ruby-css-parser

Package

Name
ruby-css-parser
Purl
pkg:deb/ubuntu/ruby-css-parser?arch=source&distro=questing

Affected ranges

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

Affected versions

1.*
1.19.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.19.0-1",
            "binary_name": "ruby-css-parser"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44312.json"
Ubuntu:26.04:LTS
ruby-css-parser

Package

Name
ruby-css-parser
Purl
pkg:deb/ubuntu/ruby-css-parser?arch=source&distro=resolute

Affected ranges

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

Affected versions

1.*
1.19.0-1
1.21.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.21.1-1",
            "binary_name": "ruby-css-parser"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-44312.json"