USN-7927-1

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/notices/USN-7927-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7927-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-7927-1
Upstream
Related
Published
2025-12-11T15:15:13.493077Z
Modified
2025-12-12T12:14:46.936423Z
Summary
python-urllib3 vulnerabilities
Details

Illia Volochii discovered that urllib3 did not limit the steps in a decompression chain. An attacker could possibly use this issue to cause urllib3 to use excessive resources, causing a denial of service. (CVE-2025-66418)

Rui Xi discovered that urllib3 incorrectly handled highly compressed data. An attacker could possibly use this issue to cause urllib3 to use excessive resources, causing a denial of service. This issue only affected Ubuntu 24.04 LTS, Ubuntu 25.04, and Ubuntu 25.10. (CVE-2025-66471)

For the brotli encoding, the fix for CVE-2025-66471 requires an additional security update in the brotli package.

References

Affected packages

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 

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

Database specific

cves_map

{
    "ecosystem": "Ubuntu:Pro:20.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-66418"
        }
    ]
}

Ubuntu:22.04:LTS / 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 

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

Database specific

cves_map

{
    "ecosystem": "Ubuntu:22.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-66418"
        }
    ]
}

Ubuntu:24.04:LTS / 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 

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

Database specific

cves_map

{
    "ecosystem": "Ubuntu:24.04:LTS",
    "cves": [
        {
            "severity": [
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-66418"
        },
        {
            "severity": [
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-66471"
        }
    ]
}

Ubuntu:25.10 / 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 

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

Database specific

cves_map

{
    "ecosystem": "Ubuntu:25.10",
    "cves": [
        {
            "severity": [
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-66418"
        },
        {
            "severity": [
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-66471"
        }
    ]
}

Ubuntu:25.04 / python-urllib3

Package

Name
python-urllib3
Purl
pkg:deb/ubuntu/python-urllib3@2.3.0-2ubuntu0.2?arch=source&distro=plucky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.3.0-2ubuntu0.2

Affected versions

2.*

2.0.7-2
2.0.7-2ubuntu0.1
2.3.0-1
2.3.0-2
2.3.0-2ubuntu0.1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-urllib3",
            "binary_version": "2.3.0-2ubuntu0.2"
        }
    ]
}

Database specific

cves_map

{
    "ecosystem": "Ubuntu:25.04",
    "cves": [
        {
            "severity": [
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-66418"
        },
        {
            "severity": [
                {
                    "score": "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",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ],
            "id": "CVE-2025-66471"
        }
    ]
}