USN-8731-1

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Source
https://ubuntu.com/security/notices/USN-8731-1
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json
JSON Data
https://api.osv.dev/v1/vulns/USN-8731-1
Upstream
Related
Published
2026-09-07T09:30:11Z
Modified
2026-09-08T12:40:06Z
Summary
miniupnpd vulnerability
Details

It was discovered that MiniUPnPd contained an integer underflow vulnerability in SOAPAction header parsing. A remote attacker could use this issue to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote.

References

Affected packages

Ubuntu:Pro:16.04:LTS
miniupnpd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.8.20140523-4.1+deb9u2ubuntu0.1~esm1

Affected versions

1.*
1.8.20140523-4
1.8.20140523-4.1+deb9u1build0.16.04.1
1.8.20140523-4.1+deb9u2build0.16.04.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "miniupnpd",
            "binary_version": "1.8.20140523-4.1+deb9u2ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5720",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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-8731-1.json"
Ubuntu:Pro:18.04:LTS
miniupnpd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.0.20171212-2ubuntu0.1~esm1

Affected versions

1.*
1.8.20140523-4.1
1.8.20140523-4.2
2.*
2.0.20171212-1
2.0.20171212-2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "miniupnpd",
            "binary_version": "2.0.20171212-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5720",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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-8731-1.json"
Ubuntu:Pro:20.04:LTS
miniupnpd

Package

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

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1-6.1ubuntu0.1~esm1

Affected versions

2.*
2.1-6ubuntu2
2.1-6.1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "miniupnpd",
            "binary_version": "2.1-6.1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5720",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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-8731-1.json"
Ubuntu:Pro:22.04:LTS
miniupnpd

Package

Name
miniupnpd
Purl
pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.2.3-1ubuntu0.1~esm1

Affected versions

2.*
2.2.1-1
2.2.3-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "miniupnpd",
            "binary_version": "2.2.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "miniupnpd-iptables",
            "binary_version": "2.2.3-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "miniupnpd-nftables",
            "binary_version": "2.2.3-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5720",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:22.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json"
Ubuntu:Pro:24.04:LTS
miniupnpd

Package

Name
miniupnpd
Purl
pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.3.4-1ubuntu0.1~esm1

Affected versions

2.*
2.3.3-1
2.3.4-1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "miniupnpd",
            "binary_version": "2.3.4-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "miniupnpd-iptables",
            "binary_version": "2.3.4-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "miniupnpd-nftables",
            "binary_version": "2.3.4-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5720",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:24.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json"
Ubuntu:Pro:26.04:LTS
miniupnpd

Package

Name
miniupnpd
Purl
pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.3.9-2ubuntu0.1~esm1

Affected versions

2.*
2.3.9-2
2.3.9-2build1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "miniupnpd",
            "binary_version": "2.3.9-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "miniupnpd-iptables",
            "binary_version": "2.3.9-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "miniupnpd-nftables",
            "binary_version": "2.3.9-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

cves_map 
{
    "cves": [
        {
            "id": "CVE-2026-5720",
            "severity": [
                {
                    "score": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
                    "type": "CVSS_V4"
                },
                {
                    "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
                    "type": "CVSS_V3"
                },
                {
                    "score": "medium",
                    "type": "Ubuntu"
                }
            ]
        }
    ],
    "ecosystem": "Ubuntu:Pro:26.04:LTS"
}
source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json"