{"id":"CVE-2026-5720","aliases":["ALPINE-CVE-2026-5720","DEBIAN-CVE-2026-5720","EUVD-2026-23565","GHSA-q4xv-xmjx-4h94","UBUNTU-CVE-2026-5720","USN-8731-1"],"status":"published","title":"miniupnpd Integer Underflow SOAPAction Header Parsing","description":"miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.","severity":{"version":"4.0","score":7.1,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00674,"percentile":0.52472,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125","CWE-191"],"published":"2026-04-17T21:39:54Z","modified":"2026-11-03T06:33:06Z","fixes":[{"ecosystem":"Alpine:v3.24","package":"miniupnpd","fixed_in":["2.3.10-r0"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"miniupnpd","fixed_in":["2.3.9-2+deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"miniupnpd","fixed_in":["2.3.10-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"miniupnpd","fixed_in":["1.8.20140523-4.1+deb9u2ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"miniupnpd","fixed_in":["2.0.20171212-2ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:20.04:LTS","package":"miniupnpd","fixed_in":["2.1-6.1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:22.04:LTS","package":"miniupnpd","fixed_in":["2.2.3-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:24.04:LTS","package":"miniupnpd","fixed_in":["2.3.4-1ubuntu0.1~esm1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:26.04:LTS","package":"miniupnpd","fixed_in":["2.3.9-2ubuntu0.1~esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.24","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.10-r0"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.1-1","2.3.10-1","2.3.3-1","2.3.4-1","2.3.7-1","2.3.7-2","2.3.9-1","2.3.9-2"]},{"source":"osv","ecosystem":"Debian:13","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.9-2+deb13u1"}]}],"versions":["2.3.9-2"]},{"source":"osv","ecosystem":"Debian:14","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.10-1"}]}],"versions":["2.3.9-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"miniupnpd","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"miniupnpd","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1-6.1ubuntu0.1~esm1"}]}],"versions":["2.1-6ubuntu2","2.1-6.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.3-1ubuntu0.1~esm1"}]}],"versions":["2.2.1-1","2.2.3-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.4-1ubuntu0.1~esm1"}]}],"versions":["2.3.3-1","2.3.4-1"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.3.7-2","2.3.9-2"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.9-2ubuntu0.1~esm1"}]}],"versions":["2.3.9-2","2.3.9-2build1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"miniupnpd","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"miniupnpd","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1-6.1ubuntu0.1~esm1"}]}],"versions":["2.1-6ubuntu2","2.1-6.1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:22.04:LTS","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.3-1ubuntu0.1~esm1"}]}],"versions":["2.2.1-1","2.2.3-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:24.04:LTS","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.4-1ubuntu0.1~esm1"}]}],"versions":["2.3.3-1","2.3.4-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:26.04:LTS","package":"miniupnpd","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.3.9-2ubuntu0.1~esm1"}]}],"versions":["2.3.9-2","2.3.9-2build1"]}],"products":[{"vendor":"miniupnp project","product":"miniupnpd"},{"vendor":"miniupnp_project","product":"miniupnpd"}],"references":[{"url":"https://github.com/miniupnp/miniupnp/","tags":["product","Product","web"]},{"url":"https://github.com/miniupnp/miniupnp/commit/f56bd09b2f2650126b832c5f30a65a09e28167fa","tags":["patch","Patch","fix"]},{"url":"https://www.vulncheck.com/advisories/miniupnpd-integer-underflow-soapaction-header-parsing","tags":["third-party-advisory","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5720","tags":["advisory"]},{"url":"https://github.com/miniupnp/miniupnp/commit/a0ee71e9fa66b60052bb3d2cf84380b79db3f8c8"},{"url":"https://github.com/miniupnp/miniupnp"},{"url":"https://github.com/miniupnp/miniupnp/commit/b5e5d2eb069822b7f00d56c8e61033b9d500e60c"},{"url":"https://github.com/advisories/GHSA-q4xv-xmjx-4h94"},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-5720","tags":["advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/5xxx/CVE-2026-5720.json","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-5720","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-5720","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-5720","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8731-1","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-5720","title":"miniupnpd Integer Underflow SOAPAction Header Parsing","description":"miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.","status":"published","published":"2026-04-17T21:39:54.818Z","modified":"2026-07-14T22:03:02.259Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-191","CWE-125"],"updated_at":"2026-11-02T13:39:27.849196Z"}],"euvd":[{"id":"EUVD-2026-23565","description":"miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.","status":"published","published":"2026-04-17T21:39:54Z","modified":"2026-07-14T22:03:02Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"updated_at":"2026-11-02T18:19:57.911867Z"}],"ghsa":[{"id":"GHSA-q4xv-xmjx-4h94","title":"miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows...","description":"miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. 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Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.","status":"published","published":"2026-04-17T22:16:33.803Z","modified":"2026-10-26T21:10:00.17Z","cvss":[{"version":"4.0","score":7.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary"}],"cwes":["CWE-125","CWE-191"],"updated_at":"2026-11-02T14:12:15.120927Z"}],"osv":[{"id":"ALPINE-CVE-2026-5720","description":"miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.","status":"published","published":"2026-04-17T22:16:33.803Z","modified":"2026-11-03T06:33:06.349710721Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-03T07:15:37.282377Z"},{"id":"CVE-2026-5720","title":"miniupnpd Integer Underflow SOAPAction Header Parsing","description":"miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.","status":"published","published":"2026-04-17T21:39:54.818Z","modified":"2026-10-28T11:18:02.058991995Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"cwes":["CWE-125","CWE-191"],"updated_at":"2026-11-02T15:45:12.016252Z"},{"id":"DEBIAN-CVE-2026-5720","description":"miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.","status":"published","published":"2026-04-17T22:16:33.803Z","modified":"2026-10-27T09:47:29.346261374Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:57.590991Z"},{"id":"UBUNTU-CVE-2026-5720","description":"miniupnpd contains an integer underflow vulnerability in SOAPAction header parsing that allows remote attackers to cause a denial of service or information disclosure by sending a malformed SOAPAction header with a single quote. Attackers can trigger an out-of-bounds memory read by exploiting improper length validation in ParseHttpHeaders(), where the parsed length underflows to a large unsigned value when passed to memchr(), causing the process to scan memory far beyond the allocated HTTP request buffer.","status":"published","published":"2026-04-17T22:16:00Z","modified":"2026-09-07T19:00:03.753300993Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T16:56:41.911783Z"},{"id":"USN-8731-1","title":"miniupnpd vulnerability","description":"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.","status":"published","published":"2026-09-07T09:30:11Z","modified":"2026-09-08T12:40:06.003256367Z","updated_at":"2026-11-02T16:58:26.907654Z"}]}}