UBUNTU-CVE-2026-126189

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Source
https://ubuntu.com/security/CVE-2026-126189
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126189.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-126189
Upstream
Published
2026-11-13T00:00:00Z
Modified
2026-11-13T21:05:39Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 4.0.1, Soup Sieve repeatedly searches descendant subtrees for each candidate evaluated by :has() and repeatedly reevaluates a parent containing :has(> ...) for each child, causing quadratic matching on deeply nested or wide attacker-influenced HTML or XML. Applications using ordinary fixed selectors through select(), select_one(), or Beautiful Soup CSS APIs against untrusted documents can have a worker occupied for seconds or minutes, while applications that process only trusted documents are not affected. Selectors compiled with NOCACHE continue to use the old uncached behavior. This issue is fixed in version 4.0.1.

References

Affected packages

Ubuntu:20.04:LTS / soupsieve

Package

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

Affected ranges

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

Affected versions

1.*
1.9.2+dfsg-2ubuntu1
1.9.4+dfsg-1
1.9.5+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python-soupsieve",
            "binary_version": "1.9.5+dfsg-1"
        },
        {
            "binary_name": "python3-soupsieve",
            "binary_version": "1.9.5+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126189.json"

Ubuntu:22.04:LTS / soupsieve

Package

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

Affected ranges

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

Affected versions

2.*
2.2.1-2
2.3-1
2.3.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-soupsieve",
            "binary_version": "2.3.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126189.json"

Ubuntu:24.04:LTS / soupsieve

Package

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

Affected ranges

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

Affected versions

2.*
2.4.1-2
2.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-soupsieve",
            "binary_version": "2.5-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126189.json"

Ubuntu:26.10 / soupsieve

Package

Name
soupsieve
Purl
pkg:deb/ubuntu/soupsieve?arch=source&distro=stonking

Affected ranges

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

Affected versions

2.*
2.8.3-1
2.8.4-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-soupsieve",
            "binary_version": "2.8.4-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126189.json"

Ubuntu:26.04:LTS / soupsieve

Package

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

Affected ranges

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

Affected versions

2.*
2.7-2
2.8.1-1
2.8.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "python3-soupsieve",
            "binary_version": "2.8.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-126189.json"