USN-8897-1

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Source
https://ubuntu.com/security/notices/USN-8897-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8897-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8897-1
Upstream
CVE (2)
Related
UBUNTU (2)
Published
2026-10-07T16:13:52Z
Modified
2026-10-08T19:58:54Z
Summary
lxml vulnerabilities
Details

Guillem Lefait discovered that lxml incorrectly handled certain URL attributes. A remote attacker could possibly use this issue to bypass URL sanitization, leading to a cross-site scripting attack. (CVE-2026-49825)

Qiu Sihao discovered that lxml incorrectly handled untrusted XML input. A remote attacker could possibly use this issue to read local files and expose sensitive information. This issue was only addressed in Ubuntu 24.04 LTS and Ubuntu 26.04 LTS. (CVE-2026-41066)

References

Affected packages

Ubuntu:22.04:LTS
lxml

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.8.0-1ubuntu0.1

Affected versions

4.*
4.6.3+dfsg-0.1
4.6.4-1
4.6.4-1ubuntu1
4.7.1-1
4.8.0-1
4.8.0-1build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-lxml",
            "binary_version": "4.8.0-1ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-41066",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-49825",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8897-1.json"
Ubuntu:24.04:LTS
lxml

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.2.1-1ubuntu0.2

Affected versions

4.*
4.9.3-1
4.9.3-1build1
4.9.4-1
5.*
5.1.0-1
5.1.0-1build1
5.1.0-1build2
5.2.1-1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-lxml",
            "binary_version": "5.2.1-1ubuntu0.2"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-41066",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-49825",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8897-1.json"
Ubuntu:26.04:LTS
lxml

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
6.0.2-1ubuntu0.1

Affected versions

6.*
6.0.1-1
6.0.1-1build1
6.0.2-1
6.0.2-1build1

Ecosystem specific 

{
    "availability": "No subscription required",
    "binaries": [
        {
            "binary_name": "python3-lxml",
            "binary_version": "6.0.2-1ubuntu0.1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-41066",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-49825",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8897-1.json"
Ubuntu:Pro:14.04:LTS
lxml

Package

Name
lxml
Purl
pkg:deb/ubuntu/lxml?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.3.3-1ubuntu0.2+esm6

Affected versions

3.*
3.2.0-1
3.3.0~beta2-1
3.3.0~beta4-1
3.3.1-1
3.3.2-1
3.3.2-1build1
3.3.3-1
3.3.3-1ubuntu0.1
3.3.3-1ubuntu0.2
3.3.3-1ubuntu0.2+esm1
3.3.3-1ubuntu0.2+esm2
3.3.3-1ubuntu0.2+esm3
3.3.3-1ubuntu0.2+esm5

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "python-lxml",
            "binary_version": "3.3.3-1ubuntu0.2+esm6"
        },
        {
            "binary_name": "python3-lxml",
            "binary_version": "3.3.3-1ubuntu0.2+esm6"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-41066",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-49825",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:14.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8897-1.json"
Ubuntu:Pro:16.04:LTS
lxml

Package

Name
lxml
Purl
pkg:deb/ubuntu/lxml?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.5.0-1ubuntu0.4+esm3

Affected versions

3.*
3.4.4-1
3.5.0-1
3.5.0-1build1
3.5.0-1ubuntu0.1
3.5.0-1ubuntu0.2
3.5.0-1ubuntu0.3
3.5.0-1ubuntu0.4
3.5.0-1ubuntu0.4+esm2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "python-lxml",
            "binary_version": "3.5.0-1ubuntu0.4+esm3"
        },
        {
            "binary_name": "python3-lxml",
            "binary_version": "3.5.0-1ubuntu0.4+esm3"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-41066",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-49825",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:16.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8897-1.json"
Ubuntu:Pro:18.04:LTS
lxml

Package

Name
lxml
Purl
pkg:deb/ubuntu/lxml?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.2.1-1ubuntu0.6+esm1

Affected versions

4.*
4.0.0-1
4.1.0-1
4.2.0-1
4.2.1-1
4.2.1-1ubuntu0.1
4.2.1-1ubuntu0.2
4.2.1-1ubuntu0.3
4.2.1-1ubuntu0.4
4.2.1-1ubuntu0.6

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "python-lxml",
            "binary_version": "4.2.1-1ubuntu0.6+esm1"
        },
        {
            "binary_name": "python3-lxml",
            "binary_version": "4.2.1-1ubuntu0.6+esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-41066",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-49825",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:18.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8897-1.json"
Ubuntu:Pro:20.04:LTS
lxml

Package

Name
lxml
Purl
pkg:deb/ubuntu/lxml?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
4.5.0-1ubuntu0.5+esm1

Affected versions

4.*
4.4.1-1
4.4.1-1build1
4.4.2-1
4.5.0-1
4.5.0-1ubuntu0.1
4.5.0-1ubuntu0.2
4.5.0-1ubuntu0.3
4.5.0-1ubuntu0.5

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "python-lxml",
            "binary_version": "4.5.0-1ubuntu0.5+esm1"
        },
        {
            "binary_name": "python3-lxml",
            "binary_version": "4.5.0-1ubuntu0.5+esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-41066",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        },
        {
            "id": "CVE-2026-49825",
            "severity": [
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:20.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8897-1.json"