{"id":"USN-8731-1","summary":"miniupnpd vulnerability","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.","modified":"2026-09-08T12:40:06.003256367Z","published":"2026-09-07T09:30:11Z","related":["UBUNTU-CVE-2026-5720"],"upstream":["CVE-2026-5720","UBUNTU-CVE-2026-5720"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8731-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-5720"}],"affected":[{"package":{"name":"miniupnpd","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.8.20140523-4.1+deb9u2ubuntu0.1~esm1"}]}],"versions":["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_version":"1.8.20140523-4.1+deb9u2ubuntu0.1~esm1","binary_name":"miniupnpd"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2026-5720","severity":[{"type":"CVSS_V4","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_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json"}},{"package":{"name":"miniupnpd","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.20171212-2ubuntu0.1~esm1"}]}],"versions":["1.8.20140523-4.1","1.8.20140523-4.2","2.0.20171212-1","2.0.20171212-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"2.0.20171212-2ubuntu0.1~esm1","binary_name":"miniupnpd"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"severity":[{"type":"CVSS_V4","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"},{"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"}],"id":"CVE-2026-5720"}]}}},{"package":{"name":"miniupnpd","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1-6.1ubuntu0.1~esm1"}]}],"versions":["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":[{"type":"CVSS_V4","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_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:Pro:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json"}},{"package":{"name":"miniupnpd","ecosystem":"Ubuntu:Pro:22.04:LTS","purl":"pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps%2Fjammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.3-1ubuntu0.1~esm1"}]}],"versions":["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_version":"2.2.3-1ubuntu0.1~esm1","binary_name":"miniupnpd-iptables"},{"binary_version":"2.2.3-1ubuntu0.1~esm1","binary_name":"miniupnpd-nftables"}]},"database_specific":{"cves_map":{"cves":[{"severity":[{"type":"CVSS_V4","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_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-5720"}],"ecosystem":"Ubuntu:Pro:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json"}},{"package":{"name":"miniupnpd","ecosystem":"Ubuntu:Pro:24.04:LTS","purl":"pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.4-1ubuntu0.1~esm1"}]}],"versions":["2.3.3-1","2.3.4-1"],"ecosystem_specific":{"binaries":[{"binary_version":"2.3.4-1ubuntu0.1~esm1","binary_name":"miniupnpd"},{"binary_name":"miniupnpd-iptables","binary_version":"2.3.4-1ubuntu0.1~esm1"},{"binary_version":"2.3.4-1ubuntu0.1~esm1","binary_name":"miniupnpd-nftables"}],"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:24.04:LTS","cves":[{"id":"CVE-2026-5720","severity":[{"type":"CVSS_V4","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_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}]}}},{"package":{"name":"miniupnpd","ecosystem":"Ubuntu:Pro:26.04:LTS","purl":"pkg:deb/ubuntu/miniupnpd?arch=source&distro=esm-apps%2Fresolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.9-2ubuntu0.1~esm1"}]}],"versions":["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_version":"2.3.9-2ubuntu0.1~esm1","binary_name":"miniupnpd-iptables"},{"binary_name":"miniupnpd-nftables","binary_version":"2.3.9-2ubuntu0.1~esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8731-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:26.04:LTS","cves":[{"severity":[{"type":"CVSS_V4","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"},{"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"}],"id":"CVE-2026-5720"}]}}}],"schema_version":"1.9.0"}