{"id":"USN-8398-4","summary":"nginx vulnerability","details":"USN-8398-3 fixed a vulnerability in nginx. This update provides the\ncorresponding fix for Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu\n18.04 LTS, and Ubuntu 20.04 LTS.\n\nOriginal advisory details:\n\n It was discovered that nginx incorrectly handled certain cookie headers in\n the HTTP/2 implementation. A remote attacker could possibly use this issue\n to cause nginx to consume excessive resources, resulting in a denial of\n service.","modified":"2026-07-02T22:49:27.237907386Z","published":"2026-07-02T12:03:17Z","upstream":["CVE-2026-49975","UBUNTU-CVE-2026-49975"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8398-4"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-49975"}],"affected":[{"package":{"name":"nginx","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.6-1ubuntu3.9+esm8"}]}],"versions":["1.4.1-3ubuntu1","1.4.3-2ubuntu1","1.4.4-1ubuntu1","1.4.4-2ubuntu1","1.4.4-4ubuntu1","1.4.5-1ubuntu1","1.4.6-1ubuntu2","1.4.6-1ubuntu3","1.4.6-1ubuntu3.1","1.4.6-1ubuntu3.2","1.4.6-1ubuntu3.3","1.4.6-1ubuntu3.4","1.4.6-1ubuntu3.5","1.4.6-1ubuntu3.6","1.4.6-1ubuntu3.7","1.4.6-1ubuntu3.8","1.4.6-1ubuntu3.9","1.4.6-1ubuntu3.9+esm1","1.4.6-1ubuntu3.9+esm2","1.4.6-1ubuntu3.9+esm3","1.4.6-1ubuntu3.9+esm4","1.4.6-1ubuntu3.9+esm5","1.4.6-1ubuntu3.9+esm6"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_version":"1.4.6-1ubuntu3.9+esm8","binary_name":"nginx"},{"binary_version":"1.4.6-1ubuntu3.9+esm8","binary_name":"nginx-common"},{"binary_name":"nginx-core","binary_version":"1.4.6-1ubuntu3.9+esm8"},{"binary_name":"nginx-extras","binary_version":"1.4.6-1ubuntu3.9+esm8"},{"binary_name":"nginx-full","binary_version":"1.4.6-1ubuntu3.9+esm8"},{"binary_name":"nginx-light","binary_version":"1.4.6-1ubuntu3.9+esm8"},{"binary_name":"nginx-naxsi","binary_version":"1.4.6-1ubuntu3.9+esm8"},{"binary_name":"nginx-naxsi-ui","binary_version":"1.4.6-1ubuntu3.9+esm8"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-4.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.10.3-0ubuntu0.16.04.5+esm9"}]}],"versions":["1.9.3-1ubuntu1","1.9.6-2ubuntu1","1.9.6-2ubuntu2","1.9.9-0ubuntu1","1.9.9-1ubuntu1","1.9.10-0ubuntu1","1.9.10-1ubuntu1","1.9.11-0ubuntu1","1.9.11-0ubuntu2","1.9.12-0ubuntu1","1.9.13-0ubuntu1","1.9.14-0ubuntu1","1.9.15-0ubuntu1","1.10.0-0ubuntu0.16.04.1","1.10.0-0ubuntu0.16.04.2","1.10.0-0ubuntu0.16.04.3","1.10.0-0ubuntu0.16.04.4","1.10.3-0ubuntu0.16.04.1","1.10.3-0ubuntu0.16.04.2","1.10.3-0ubuntu0.16.04.3","1.10.3-0ubuntu0.16.04.4","1.10.3-0ubuntu0.16.04.5","1.10.3-0ubuntu0.16.04.5+esm1","1.10.3-0ubuntu0.16.04.5+esm2","1.10.3-0ubuntu0.16.04.5+esm3","1.10.3-0ubuntu0.16.04.5+esm4","1.10.3-0ubuntu0.16.04.5+esm5","1.10.3-0ubuntu0.16.04.5+esm6","1.10.3-0ubuntu0.16.04.5+esm7"],"ecosystem_specific":{"binaries":[{"binary_version":"1.10.3-0ubuntu0.16.04.5+esm9","binary_name":"nginx"},{"binary_name":"nginx-common","binary_version":"1.10.3-0ubuntu0.16.04.5+esm9"},{"binary_name":"nginx-core","binary_version":"1.10.3-0ubuntu0.16.04.5+esm9"},{"binary_name":"nginx-extras","binary_version":"1.10.3-0ubuntu0.16.04.5+esm9"},{"binary_version":"1.10.3-0ubuntu0.16.04.5+esm9","binary_name":"nginx-full"},{"binary_name":"nginx-light","binary_version":"1.10.3-0ubuntu0.16.04.5+esm9"}],"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[],"ecosystem":"Ubuntu:Pro:16.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-4.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.14.0-0ubuntu1.11+esm4"}]}],"versions":["1.12.1-0ubuntu2","1.13.6-2ubuntu1","1.13.6-2ubuntu2","1.13.10-1ubuntu1","1.13.12-0ubuntu1","1.14.0-0ubuntu1","1.14.0-0ubuntu1.1","1.14.0-0ubuntu1.2","1.14.0-0ubuntu1.3","1.14.0-0ubuntu1.4","1.14.0-0ubuntu1.5","1.14.0-0ubuntu1.6","1.14.0-0ubuntu1.7","1.14.0-0ubuntu1.9","1.14.0-0ubuntu1.10","1.14.0-0ubuntu1.11","1.14.0-0ubuntu1.11+esm1","1.14.0-0ubuntu1.11+esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-auth-pam","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_version":"1.14.0-0ubuntu1.11+esm4","binary_name":"libnginx-mod-http-cache-purge"},{"binary_name":"libnginx-mod-http-dav-ext","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"libnginx-mod-http-echo","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"libnginx-mod-http-fancyindex","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"libnginx-mod-http-headers-more-filter","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"libnginx-mod-http-lua","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"libnginx-mod-http-ndk","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_version":"1.14.0-0ubuntu1.11+esm4","binary_name":"libnginx-mod-http-subs-filter"},{"binary_name":"libnginx-mod-http-uploadprogress","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_version":"1.14.0-0ubuntu1.11+esm4","binary_name":"libnginx-mod-http-upstream-fair"},{"binary_version":"1.14.0-0ubuntu1.11+esm4","binary_name":"libnginx-mod-http-xslt-filter"},{"binary_version":"1.14.0-0ubuntu1.11+esm4","binary_name":"libnginx-mod-mail"},{"binary_name":"libnginx-mod-nchan","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_version":"1.14.0-0ubuntu1.11+esm4","binary_name":"libnginx-mod-rtmp"},{"binary_name":"libnginx-mod-stream","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"nginx","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"nginx-common","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_version":"1.14.0-0ubuntu1.11+esm4","binary_name":"nginx-core"},{"binary_version":"1.14.0-0ubuntu1.11+esm4","binary_name":"nginx-extras"},{"binary_name":"nginx-full","binary_version":"1.14.0-0ubuntu1.11+esm4"},{"binary_name":"nginx-light","binary_version":"1.14.0-0ubuntu1.11+esm4"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-4.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+esm3"}]}],"versions":["1.16.1-0ubuntu2","1.16.1-0ubuntu3","1.17.5-0ubuntu1","1.17.6-0ubuntu1","1.17.7-0ubuntu1","1.17.8-0ubuntu1","1.17.8-0ubuntu2","1.17.8-0ubuntu3","1.17.9-0ubuntu1","1.17.9-0ubuntu2","1.17.9-0ubuntu3","1.17.10-0ubuntu1","1.18.0-0ubuntu1","1.18.0-0ubuntu1.2","1.18.0-0ubuntu1.3","1.18.0-0ubuntu1.4","1.18.0-0ubuntu1.5","1.18.0-0ubuntu1.6","1.18.0-0ubuntu1.7","1.18.0-0ubuntu1.7+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-auth-pam","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_name":"libnginx-mod-http-cache-purge","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"libnginx-mod-http-dav-ext"},{"binary_name":"libnginx-mod-http-echo","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_name":"libnginx-mod-http-fancyindex","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"libnginx-mod-http-geoip"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"libnginx-mod-http-geoip2"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"libnginx-mod-http-headers-more-filter"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"libnginx-mod-http-image-filter"},{"binary_name":"libnginx-mod-http-lua","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_name":"libnginx-mod-http-ndk","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"libnginx-mod-http-subs-filter"},{"binary_name":"libnginx-mod-http-uploadprogress","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_name":"libnginx-mod-http-upstream-fair","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"libnginx-mod-http-xslt-filter"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"libnginx-mod-mail"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"libnginx-mod-nchan"},{"binary_name":"libnginx-mod-rtmp","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_name":"libnginx-mod-stream","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"nginx"},{"binary_name":"nginx-common","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_name":"nginx-core","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_name":"nginx-extras","binary_version":"1.18.0-0ubuntu1.7+esm3"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"nginx-full"},{"binary_version":"1.18.0-0ubuntu1.7+esm3","binary_name":"nginx-light"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-4.json"}}],"schema_version":"1.7.5"}