usn-8731-1
Vulnerability from osv_ubuntu
Published
2026-09-07 09:30
Modified
2026-09-07 09:30
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
| URL | Type | |
|---|---|---|
{
"affected": [
{
"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"
}
},
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "miniupnpd",
"purl": "pkg:deb/ubuntu/miniupnpd@1.8.20140523-4.1+deb9u2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.20140523-4.1+deb9u2ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.8.20140523-4",
"1.8.20140523-4.1+deb9u1build0.16.04.1",
"1.8.20140523-4.1+deb9u2build0.16.04.1"
]
},
{
"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"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "miniupnpd",
"binary_version": "2.0.20171212-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "miniupnpd",
"purl": "pkg:deb/ubuntu/miniupnpd@2.0.20171212-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.20171212-2ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.8.20140523-4.1",
"1.8.20140523-4.2",
"2.0.20171212-1",
"2.0.20171212-2"
]
},
{
"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"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "miniupnpd",
"binary_version": "2.1-6.1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "miniupnpd",
"purl": "pkg:deb/ubuntu/miniupnpd@2.1-6.1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1-6.1ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.1-6ubuntu2",
"2.1-6.1"
]
},
{
"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"
}
},
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "miniupnpd",
"purl": "pkg:deb/ubuntu/miniupnpd@2.2.3-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.2.3-1ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.2.1-1",
"2.2.3-1"
]
},
{
"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"
}
},
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "miniupnpd",
"purl": "pkg:deb/ubuntu/miniupnpd@2.3.4-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.3.4-1ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.3.3-1",
"2.3.4-1"
]
},
{
"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"
}
},
"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"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:26.04:LTS",
"name": "miniupnpd",
"purl": "pkg:deb/ubuntu/miniupnpd@2.3.9-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.3.9-2ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.3.9-2",
"2.3.9-2build1"
]
}
],
"aliases": [],
"details": "It was discovered that MiniUPnPd contained an integer underflow\nvulnerability in SOAPAction header parsing. A remote attacker could\nuse this issue to cause a denial of service or information disclosure\nby sending a malformed SOAPAction header with a single quote.",
"id": "USN-8731-1",
"modified": "2026-09-07T09:30:11Z",
"published": "2026-09-07T09:30:11Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8731-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-5720"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "miniupnpd vulnerability",
"upstream": [
"UBUNTU-CVE-2026-5720"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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