{"id":"CVE-2026-45764","aliases":["DEBIAN-CVE-2026-45764","EUVD-2026-75757","GHSA-5rvq-72r5-rqhr","UBUNTU-CVE-2026-45764","openSUSE-SU-2026:10885-1"],"status":"published","title":"Suricata http2: protocol-change type confusion can lead to denial of service","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00633,"percentile":0.508,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-843"],"published":"2026-05-28T00:00:00Z","modified":"2026-10-28T02:30:37Z","fixes":[{"ecosystem":"Debian:14","package":"suricata","fixed_in":["1:8.0.5-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:13","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:7.0.10-1","1:7.0.10-1+deb13u1","1:7.0.10-1+deb13u2","1:7.0.10-1+deb13u3","1:7.0.10-1+deb13u4","1:7.0.11-1","1:7.0.11-1~bpo13+1","1:8.0.0-1~exp1","1:8.0.0-1~exp2","1:8.0.0-1~exp4","1:8.0.0-1~exp5","1:8.0.1-1","1:8.0.1-2","1:8.0.1-3","1:8.0.1-3~bpo13+1","1:8.0.2-1","1:8.0.2-1~bpo13+1","1:8.0.3-1","1:8.0.3-1~bpo13+1","1:8.0.3-2~exp1","1:8.0.4-1","1:8.0.4-1~bpo13+1","1:8.0.5-1","1:8.0.5-1~bpo13+1","1:8.0.6-1","1:8.0.6-1~bpo13+1","1:8.0.7-1","1:8.0.7-1~bpo13+1","1:8.0.7-2~exp1"]},{"source":"osv","ecosystem":"Debian:14","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:8.0.5-1"}]}],"versions":["1:7.0.10-1","1:7.0.11-1","1:7.0.11-1~bpo13+1","1:8.0.0-1~exp1","1:8.0.0-1~exp2","1:8.0.0-1~exp4","1:8.0.0-1~exp5","1:8.0.1-1","1:8.0.1-2","1:8.0.1-3","1:8.0.1-3~bpo13+1","1:8.0.2-1","1:8.0.2-1~bpo13+1","1:8.0.3-1","1:8.0.3-1~bpo13+1","1:8.0.3-2~exp1","1:8.0.4-1","1:8.0.4-1~bpo13+1","1:8.0.5-1~bpo13+1"]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.0.8-1build1","2.0.9-1","2.0.10-1","2.0.10-2","2.0.11-1","3.0-1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2-2ubuntu3"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:6.0.4-2","1:6.0.4-3"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:7.0.0-2","1:7.0.2-1","1:7.0.2-1build1","1:7.0.3-1build1","1:7.0.3-1build3"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1:7.0.10-1","1:8.0.1-3build1","1:8.0.2-1","1:8.0.2-1build1","1:8.0.3-1"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"suricata","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"8.0.5-1.1"}]}],"bundled":15}],"products":[{"vendor":"oisf","product":"suricata"}],"references":[{"url":"https://github.com/OISF/suricata/security/advisories/GHSA-5rvq-72r5-rqhr","tags":["x_refsource_CONFIRM","Third Party Advisory","advisory","report"]},{"url":"https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315","tags":["x_refsource_MISC","Release Notes","Vendor Advisory","web","report"]},{"url":"https://redmine.openinfosecfoundation.org/issues/8492","tags":["x_refsource_MISC","Permissions Required","web","report"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/45xxx/CVE-2026-45764.json","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45764","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-45764","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-45764","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-45764","tags":["report"]},{"url":"https://redmine.openinfosecfoundation.org/issues/8494","tags":["report"]},{"url":"https://redmine.openinfosecfoundation.org/issues/8493","tags":["report"]},{"url":"https://github.com/OISF/suricata/commit/61c4df2821441226a2e0d3a5723f44ba95764cdd","tags":["report"]},{"url":"https://github.com/OISF/suricata/commit/75a4641af6ee87a605e10557e6e2417330227a6a","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45751","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45752","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45759","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45761","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45762","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45763","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45764","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45765","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45766","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45767","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45768","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45769","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-45770","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-46352","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-46387","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2026-45764","title":"Suricata http2: protocol-change type confusion can lead to denial of service","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.","status":"published","published":"2026-09-10T21:14:30.072Z","modified":"2026-09-11T15:12:09.425Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical","assessor":"cna"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T13:46:32.755125Z"}],"euvd":[{"id":"EUVD-2026-75757","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.","status":"published","published":"2026-09-10T21:14:30Z","modified":"2026-09-11T15:12:09Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T17:28:22.567961Z"}],"nvd":[{"id":"CVE-2026-45764","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.","status":"published","published":"2026-09-10T22:16:56.25Z","modified":"2026-09-16T20:17:56.497Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical","assessor":"secondary"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T14:12:46.271848Z"}],"osv":[{"id":"CVE-2026-45764","title":"Suricata http2: protocol-change type confusion can lead to denial of service","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.","status":"published","published":"2026-09-10T21:14:30.072Z","modified":"2026-10-28T02:30:37.598315612Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical"}],"cwes":["CWE-843"],"updated_at":"2026-11-02T15:45:05.525666Z"},{"id":"DEBIAN-CVE-2026-45764","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.","status":"published","published":"2026-09-10T22:16:56.25Z","modified":"2026-10-01T03:03:14.656711935Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:55.669088Z"},{"id":"UBUNTU-CVE-2026-45764","description":"Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a protocol change while processing HTTP/2 traffic could lead to type confusion in Suricata. Crafted traffic may cause Suricata to crash, resulting in denial of service. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, disable HTTP/2 parsing if it is not required.","status":"published","published":"2026-09-10T22:16:00Z","modified":"2026-09-16T11:34:30Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T16:56:26.396868Z"},{"id":"openSUSE-SU-2026:10885-1","title":"libsuricata8_0_5-8.0.5-1.1 on GA media","description":"These are all security issues fixed in the libsuricata8_0_5-8.0.5-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-05-28T00:00:00Z","modified":"2026-05-29T08:15:06.445006444Z","updated_at":"2026-11-02T16:58:38.95195Z"}]}}