UBUNTU-CVE-2026-123202

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Source
https://ubuntu.com/security/CVE-2026-123202
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123202.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-123202
Upstream
Published
2026-11-06T00:00:00Z
Modified
2026-11-07T01:46:30Z
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
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

libnxml before 0.18.6 contains a stack-based buffer overflow vulnerability in src/nxml_parser.c that allows remote attackers to write past a 1024-byte stack buffer via long XML names. Attackers can supply XML or RSS feeds with a 1022-character element, attribute, DOCTYPE or entity name ending in a multi-byte UTF-8 character to crash parsing applications.

References

Affected packages

Ubuntu:16.04:LTS
libnxml

Package

Name
libnxml
Purl
pkg:deb/ubuntu/libnxml?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*
0.18.3-6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnxml0",
            "binary_version": "0.18.3-6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123202.json"
Ubuntu:18.04:LTS
libnxml

Package

Name
libnxml
Purl
pkg:deb/ubuntu/libnxml?arch=source&distro=bionic

Affected ranges

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

Affected versions

0.*
0.18.3-6

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnxml0",
            "binary_version": "0.18.3-6"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123202.json"
Ubuntu:20.04:LTS
libnxml

Package

Name
libnxml
Purl
pkg:deb/ubuntu/libnxml?arch=source&distro=focal

Affected ranges

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

Affected versions

0.*
0.18.3-7
0.18.3-8

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnxml0",
            "binary_version": "0.18.3-8"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123202.json"
Ubuntu:22.04:LTS
libnxml

Package

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

Affected ranges

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

Affected versions

0.*
0.18.3-8
0.18.4-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnxml0",
            "binary_version": "0.18.4-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123202.json"
Ubuntu:24.04:LTS
libnxml

Package

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

Affected ranges

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

Affected versions

0.*
0.18.4-1
0.18.4-2
0.18.5-1build1
0.18.5-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnxml0t64",
            "binary_version": "0.18.5-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123202.json"
Ubuntu:26.04:LTS
libnxml

Package

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

Affected ranges

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

Affected versions

0.*
0.18.5-1build2
0.18.5-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnxml0t64",
            "binary_version": "0.18.5-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123202.json"
Ubuntu:26.10
libnxml

Package

Name
libnxml
Purl
pkg:deb/ubuntu/libnxml?arch=source&distro=stonking

Affected ranges

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

Affected versions

0.*
0.18.5-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libnxml0t64",
            "binary_version": "0.18.5-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-123202.json"