UBUNTU-CVE-2026-49477

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-49477
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49477.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-49477
Upstream
Published
2026-07-14T21:17:00Z
Modified
2026-07-15T19:47:27.072146364Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

Soup Sieve is a CSS selector library designed to be used with Beautiful Soup 4. Prior to 2.8.4, the CSS selector parser in soupsieve contains a regular expression vulnerable to catastrophic backtracking when processing an attribute selector with an unterminated quoted value in soupsieve/cssparser.py, allowing an attacker who can supply untrusted CSS selector strings to soupsieve.compile() or Beautiful Soup .select() / .selectone() to cause CPU exhaustion and denial of service. This issue is fixed in version 2.8.4.

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
0Unknown 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_version": "1.9.5+dfsg-1",
            "binary_name": "python-soupsieve"
        },
        {
            "binary_version": "1.9.5+dfsg-1",
            "binary_name": "python3-soupsieve"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49477.json"

Ubuntu:22.04:LTS / soupsieve

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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_version": "2.3.1-1",
            "binary_name": "python3-soupsieve"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49477.json"

Ubuntu:24.04:LTS / soupsieve

Package

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

Affected ranges

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

Affected versions

2.*
2.4.1-2
2.5-1

Ecosystem specific 

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

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49477.json"

Ubuntu:26.04:LTS / soupsieve

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown 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_version": "2.8.3-1",
            "binary_name": "python3-soupsieve"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49477.json"