USN-8787-1

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Source
https://ubuntu.com/security/notices/USN-8787-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8787-1.json
JSON Data
https://api.test.osv.dev/v1/vulns/USN-8787-1
Upstream
CVE (2)
Related
UBUNTU (2)
Published
2026-09-21T12:31:10Z
Modified
2026-09-21T21:43:36Z
Summary
libxml2 vulnerabilities
Details

It was discovered that libxml2 incorrectly handled certain XML elements under certain circumstances. An attacker could possibly use this issue to cause libxml2 to crash or execute arbitrary code. (CVE-2026-86140)

It was discovered that libxml2 incorrectly handled certain XML documents when used with Python bindings. A remote attacker could possibly use this issue to cause applications using libxml2 to crash, resulting in a denial of service. (CVE-2026-74860)

References

Affected packages

Ubuntu:22.04:LTS
libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.9.13+dfsg-1ubuntu0.13

Affected versions

2.*
2.9.12+dfsg-4
2.9.12+dfsg-5
2.9.12+dfsg-6
2.9.13+dfsg-1
2.9.13+dfsg-1build1
2.9.13+dfsg-1ubuntu0.1
2.9.13+dfsg-1ubuntu0.2
2.9.13+dfsg-1ubuntu0.3
2.9.13+dfsg-1ubuntu0.4
2.9.13+dfsg-1ubuntu0.5
2.9.13+dfsg-1ubuntu0.6
2.9.13+dfsg-1ubuntu0.7
2.9.13+dfsg-1ubuntu0.8
2.9.13+dfsg-1ubuntu0.9
2.9.13+dfsg-1ubuntu0.10
2.9.13+dfsg-1ubuntu0.11
2.9.13+dfsg-1ubuntu0.12

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libxml2",
            "binary_version":  "2.9.13+dfsg-1ubuntu0.13"
        },
        {
            "binary_name":  "libxml2-utils",
            "binary_version":  "2.9.13+dfsg-1ubuntu0.13"
        },
        {
            "binary_name":  "python3-libxml2",
            "binary_version":  "2.9.13+dfsg-1ubuntu0.13"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-74860",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-86140",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "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-8787-1.json"
Ubuntu:24.04:LTS
libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.9.14+dfsg-1.3ubuntu3.9

Affected versions

2.*
2.9.14+dfsg-1.3
2.9.14+dfsg-1.3build1
2.9.14+dfsg-1.3build2
2.9.14+dfsg-1.3build3
2.9.14+dfsg-1.3ubuntu1
2.9.14+dfsg-1.3ubuntu2
2.9.14+dfsg-1.3ubuntu3
2.9.14+dfsg-1.3ubuntu3.1
2.9.14+dfsg-1.3ubuntu3.2
2.9.14+dfsg-1.3ubuntu3.3
2.9.14+dfsg-1.3ubuntu3.4
2.9.14+dfsg-1.3ubuntu3.5
2.9.14+dfsg-1.3ubuntu3.6
2.9.14+dfsg-1.3ubuntu3.7
2.9.14+dfsg-1.3ubuntu3.8

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libxml2",
            "binary_version":  "2.9.14+dfsg-1.3ubuntu3.9"
        },
        {
            "binary_name":  "libxml2-utils",
            "binary_version":  "2.9.14+dfsg-1.3ubuntu3.9"
        },
        {
            "binary_name":  "python3-libxml2",
            "binary_version":  "2.9.14+dfsg-1.3ubuntu3.9"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-74860",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-86140",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "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-8787-1.json"
Ubuntu:26.04:LTS
libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.15.2+dfsg-0.1ubuntu0.2

Affected versions

2.*
2.14.5+dfsg-0.2
2.14.5+dfsg-0.2build1
2.15.1+dfsg-0.3
2.15.1+dfsg-0.4
2.15.1+dfsg-1
2.15.1+dfsg-2
2.15.1+dfsg-2ubuntu1
2.15.1+dfsg-2ubuntu2
2.15.2+dfsg-0.1
2.15.2+dfsg-0.1ubuntu0.1

Ecosystem specific 

{
    "availability":  "No subscription required",
    "binaries":  [
        {
            "binary_name":  "libxml2-16",
            "binary_version":  "2.15.2+dfsg-0.1ubuntu0.2"
        },
        {
            "binary_name":  "libxml2-source",
            "binary_version":  "2.15.2+dfsg-0.1ubuntu0.2"
        },
        {
            "binary_name":  "libxml2-utils",
            "binary_version":  "2.15.2+dfsg-0.1ubuntu0.2"
        },
        {
            "binary_name":  "python3-libxml2",
            "binary_version":  "2.15.2+dfsg-0.1ubuntu0.2"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-74860",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-86140",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "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-8787-1.json"
Ubuntu:Pro:14.04:LTS
libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2?arch=source&distro=esm-infra-legacy%2Ftrusty

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.9.1+dfsg1-3ubuntu4.13+esm12

Affected versions

2.*
2.9.1+dfsg1-3ubuntu2
2.9.1+dfsg1-3ubuntu3
2.9.1+dfsg1-3ubuntu4
2.9.1+dfsg1-3ubuntu4.1
2.9.1+dfsg1-3ubuntu4.2
2.9.1+dfsg1-3ubuntu4.3
2.9.1+dfsg1-3ubuntu4.4
2.9.1+dfsg1-3ubuntu4.5
2.9.1+dfsg1-3ubuntu4.6
2.9.1+dfsg1-3ubuntu4.7
2.9.1+dfsg1-3ubuntu4.8
2.9.1+dfsg1-3ubuntu4.9
2.9.1+dfsg1-3ubuntu4.10
2.9.1+dfsg1-3ubuntu4.11
2.9.1+dfsg1-3ubuntu4.12
2.9.1+dfsg1-3ubuntu4.13
2.9.1+dfsg1-3ubuntu4.13+esm1
2.9.1+dfsg1-3ubuntu4.13+esm2
2.9.1+dfsg1-3ubuntu4.13+esm3
2.9.1+dfsg1-3ubuntu4.13+esm4
2.9.1+dfsg1-3ubuntu4.13+esm5
2.9.1+dfsg1-3ubuntu4.13+esm6
2.9.1+dfsg1-3ubuntu4.13+esm7
2.9.1+dfsg1-3ubuntu4.13+esm8
2.9.1+dfsg1-3ubuntu4.13+esm9
2.9.1+dfsg1-3ubuntu4.13+esm10
2.9.1+dfsg1-3ubuntu4.13+esm11

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libxml2",
            "binary_version":  "2.9.1+dfsg1-3ubuntu4.13+esm12"
        },
        {
            "binary_name":  "libxml2-utils",
            "binary_version":  "2.9.1+dfsg1-3ubuntu4.13+esm12"
        },
        {
            "binary_name":  "python-libxml2",
            "binary_version":  "2.9.1+dfsg1-3ubuntu4.13+esm12"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-74860",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-86140",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "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-8787-1.json"
Ubuntu:Pro:16.04:LTS
libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2?arch=source&distro=esm-infra-legacy%2Fxenial

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.9.3+dfsg1-1ubuntu0.7+esm13

Affected versions

2.*
2.9.2+zdfsg1-4
2.9.2+zdfsg1-4ubuntu1
2.9.2+zdfsg1-4ubuntu2
2.9.2+zdfsg1-4ubuntu3
2.9.3+dfsg1-1
2.9.3+dfsg1-1ubuntu0.1
2.9.3+dfsg1-1ubuntu0.2
2.9.3+dfsg1-1ubuntu0.3
2.9.3+dfsg1-1ubuntu0.4
2.9.3+dfsg1-1ubuntu0.5
2.9.3+dfsg1-1ubuntu0.6
2.9.3+dfsg1-1ubuntu0.7
2.9.3+dfsg1-1ubuntu0.7+esm1
2.9.3+dfsg1-1ubuntu0.7+esm2
2.9.3+dfsg1-1ubuntu0.7+esm3
2.9.3+dfsg1-1ubuntu0.7+esm4
2.9.3+dfsg1-1ubuntu0.7+esm5
2.9.3+dfsg1-1ubuntu0.7+esm6
2.9.3+dfsg1-1ubuntu0.7+esm7
2.9.3+dfsg1-1ubuntu0.7+esm8
2.9.3+dfsg1-1ubuntu0.7+esm9
2.9.3+dfsg1-1ubuntu0.7+esm10
2.9.3+dfsg1-1ubuntu0.7+esm11
2.9.3+dfsg1-1ubuntu0.7+esm12

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libxml2",
            "binary_version":  "2.9.3+dfsg1-1ubuntu0.7+esm13"
        },
        {
            "binary_name":  "libxml2-utils",
            "binary_version":  "2.9.3+dfsg1-1ubuntu0.7+esm13"
        },
        {
            "binary_name":  "python-libxml2",
            "binary_version":  "2.9.3+dfsg1-1ubuntu0.7+esm13"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-74860",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-86140",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "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-8787-1.json"
Ubuntu:Pro:18.04:LTS
libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2?arch=source&distro=esm-infra%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.9.4+dfsg1-6.1ubuntu1.9+esm8

Affected versions

2.*
2.9.4+dfsg1-4ubuntu1
2.9.4+dfsg1-5ubuntu1
2.9.4+dfsg1-5ubuntu2
2.9.4+dfsg1-5.1ubuntu1
2.9.4+dfsg1-5.2ubuntu1
2.9.4+dfsg1-6.1ubuntu1
2.9.4+dfsg1-6.1ubuntu1.2
2.9.4+dfsg1-6.1ubuntu1.3
2.9.4+dfsg1-6.1ubuntu1.4
2.9.4+dfsg1-6.1ubuntu1.5
2.9.4+dfsg1-6.1ubuntu1.6
2.9.4+dfsg1-6.1ubuntu1.7
2.9.4+dfsg1-6.1ubuntu1.8
2.9.4+dfsg1-6.1ubuntu1.9
2.9.4+dfsg1-6.1ubuntu1.9+esm1
2.9.4+dfsg1-6.1ubuntu1.9+esm2
2.9.4+dfsg1-6.1ubuntu1.9+esm3
2.9.4+dfsg1-6.1ubuntu1.9+esm4
2.9.4+dfsg1-6.1ubuntu1.9+esm5
2.9.4+dfsg1-6.1ubuntu1.9+esm6
2.9.4+dfsg1-6.1ubuntu1.9+esm7

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libxml2",
            "binary_version":  "2.9.4+dfsg1-6.1ubuntu1.9+esm8"
        },
        {
            "binary_name":  "libxml2-utils",
            "binary_version":  "2.9.4+dfsg1-6.1ubuntu1.9+esm8"
        },
        {
            "binary_name":  "python-libxml2",
            "binary_version":  "2.9.4+dfsg1-6.1ubuntu1.9+esm8"
        },
        {
            "binary_name":  "python3-libxml2",
            "binary_version":  "2.9.4+dfsg1-6.1ubuntu1.9+esm8"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-74860",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-86140",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "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-8787-1.json"
Ubuntu:Pro:20.04:LTS
libxml2

Package

Name
libxml2
Purl
pkg:deb/ubuntu/libxml2?arch=source&distro=esm-infra%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.9.10+dfsg-5ubuntu0.20.04.10+esm5

Affected versions

2.*
2.9.4+dfsg1-7ubuntu3
2.9.4+dfsg1-7ubuntu5
2.9.4+dfsg1-8ubuntu1
2.9.4+dfsg1-8ubuntu2
2.9.4+dfsg1-8ubuntu3
2.9.10+dfsg-1ubuntu3
2.9.10+dfsg-4build1
2.9.10+dfsg-5
2.9.10+dfsg-5ubuntu0.20.04.1
2.9.10+dfsg-5ubuntu0.20.04.2
2.9.10+dfsg-5ubuntu0.20.04.3
2.9.10+dfsg-5ubuntu0.20.04.4
2.9.10+dfsg-5ubuntu0.20.04.5
2.9.10+dfsg-5ubuntu0.20.04.6
2.9.10+dfsg-5ubuntu0.20.04.7
2.9.10+dfsg-5ubuntu0.20.04.8
2.9.10+dfsg-5ubuntu0.20.04.9
2.9.10+dfsg-5ubuntu0.20.04.10
2.9.10+dfsg-5ubuntu0.20.04.10+esm1
2.9.10+dfsg-5ubuntu0.20.04.10+esm2
2.9.10+dfsg-5ubuntu0.20.04.10+esm3
2.9.10+dfsg-5ubuntu0.20.04.10+esm4

Ecosystem specific 

{
    "availability":  "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
    "binaries":  [
        {
            "binary_name":  "libxml2",
            "binary_version":  "2.9.10+dfsg-5ubuntu0.20.04.10+esm5"
        },
        {
            "binary_name":  "libxml2-utils",
            "binary_version":  "2.9.10+dfsg-5ubuntu0.20.04.10+esm5"
        },
        {
            "binary_name":  "python-libxml2",
            "binary_version":  "2.9.10+dfsg-5ubuntu0.20.04.10+esm5"
        },
        {
            "binary_name":  "python3-libxml2",
            "binary_version":  "2.9.10+dfsg-5ubuntu0.20.04.10+esm5"
        }
    ]
}

Database specific

cves_map 
{
    "cves":  [
        {
            "id":  "CVE-2026-74860",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "medium",
                    "type":  "Ubuntu"
                }
            ]
        },
        {
            "id":  "CVE-2026-86140",
            "severity":  [
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L",
                    "type":  "CVSS_V3"
                },
                {
                    "score":  "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                    "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-8787-1.json"