UBUNTU-CVE-2025-66418

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Source
https://ubuntu.com/security/CVE-2025-66418
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66418.json
JSON Data
https://api.test.osv.dev/v1/vulns/UBUNTU-CVE-2025-66418
Upstream
Downstream
Related
Published
2025-12-05T16:15:00Z
Modified
2026-02-05T20:58:42.748393Z
Severity
  • 8.9 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H CVSS Calculator
  • 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

urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leading to high CPU usage and massive memory allocation for the decompressed data. This vulnerability is fixed in 2.6.0.

References

Affected packages

Ubuntu:22.04:LTS
python-pip

Package

Name
python-pip
Purl
pkg:deb/ubuntu/python-pip@22.0.2+dfsg-1ubuntu0.7?arch=source&distro=jammy

Affected ranges

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

Affected versions

20.*
20.3.4-4
21.*
21.3.1+dfsg-3
22.*
22.0.2+dfsg-1
22.0.2+dfsg-1ubuntu0.1
22.0.2+dfsg-1ubuntu0.2
22.0.2+dfsg-1ubuntu0.3
22.0.2+dfsg-1ubuntu0.4
22.0.2+dfsg-1ubuntu0.5
22.0.2+dfsg-1ubuntu0.6
22.0.2+dfsg-1ubuntu0.7

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "22.0.2+dfsg-1ubuntu0.7",
            "binary_name": "python3-pip"
        },
        {
            "binary_version": "22.0.2+dfsg-1ubuntu0.7",
            "binary_name": "python3-pip-whl"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66418.json"
python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/ubuntu/python-urllib3@1.26.5-1~exp1ubuntu0.4?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.26.5-1~exp1ubuntu0.4

Affected versions

1.*
1.26.5-1~exp1
1.26.5-1~exp1ubuntu0.1
1.26.5-1~exp1ubuntu0.2
1.26.5-1~exp1ubuntu0.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.26.5-1~exp1ubuntu0.4",
            "binary_name": "python3-urllib3"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66418.json"
Ubuntu:24.04:LTS
python-pip

Package

Name
python-pip
Purl
pkg:deb/ubuntu/python-pip@24.0+dfsg-1ubuntu1.3?arch=source&distro=noble

Affected ranges

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

Affected versions

23.*
23.2+dfsg-1
23.3+dfsg-1
24.*
24.0+dfsg-1
24.0+dfsg-1ubuntu1
24.0+dfsg-1ubuntu1.1
24.0+dfsg-1ubuntu1.2
24.0+dfsg-1ubuntu1.3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "24.0+dfsg-1ubuntu1.3",
            "binary_name": "python3-pip"
        },
        {
            "binary_version": "24.0+dfsg-1ubuntu1.3",
            "binary_name": "python3-pip-whl"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66418.json"
python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/ubuntu/python-urllib3@2.0.7-1ubuntu0.3?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.0.7-1ubuntu0.3

Affected versions

1.*
1.26.16-1
1.26.18-1
2.*
2.0.7-1
2.0.7-1ubuntu0.1
2.0.7-1ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.0.7-1ubuntu0.3",
            "binary_name": "python3-urllib3"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66418.json"
Ubuntu:25.10
python-pip

Package

Name
python-pip
Purl
pkg:deb/ubuntu/python-pip@25.1.1+dfsg-1ubuntu2?arch=source&distro=questing

Affected ranges

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

Affected versions

25.*
25.0+dfsg-1
25.1.1+dfsg-1
25.1.1+dfsg-1ubuntu1
25.1.1+dfsg-1ubuntu2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "25.1.1+dfsg-1ubuntu2",
            "binary_name": "python3-pip"
        },
        {
            "binary_version": "25.1.1+dfsg-1ubuntu2",
            "binary_name": "python3-pip-whl"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66418.json"
python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/ubuntu/python-urllib3@2.3.0-3ubuntu0.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.3.0-3ubuntu0.1

Affected versions

2.*
2.3.0-2
2.3.0-2ubuntu1
2.3.0-3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "2.3.0-3ubuntu0.1",
            "binary_name": "python3-urllib3"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66418.json"
Ubuntu:Pro:20.04:LTS
python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/ubuntu/python-urllib3@1.25.8-2ubuntu0.4+esm2?arch=source&distro=esm-infra/focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.25.8-2ubuntu0.4+esm2

Affected versions

1.*
1.24.1-1ubuntu1
1.24.1-1ubuntu2
1.25.8-1
1.25.8-2
1.25.8-2ubuntu0.1
1.25.8-2ubuntu0.2
1.25.8-2ubuntu0.3
1.25.8-2ubuntu0.4
1.25.8-2ubuntu0.4+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.25.8-2ubuntu0.4+esm2",
            "binary_name": "python3-urllib3"
        }
    ],
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-66418.json"