{"id":"USN-8398-3","summary":"nginx vulnerability","details":"USN-8398-1 fixed a vulnerability in nginx. The update caused a regression\nand was temporarily reverted in USN-8398-2. This update introduces a\ncomplete fix for CVE-2026-49975.\n\nWe apologize for the inconvenience.\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":"2026-06-15T20:29:22.130819054Z","published":"2026-06-15T12:44:22Z","related":["UBUNTU-CVE-2026-49975"],"upstream":["CVE-2026-49975","UBUNTU-CVE-2026-49975"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8398-3"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-49975"}],"affected":[{"package":{"name":"nginx","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-6ubuntu14.15"}]}],"versions":["1.18.0-6ubuntu11","1.18.0-6ubuntu12","1.18.0-6ubuntu14","1.18.0-6ubuntu14.1","1.18.0-6ubuntu14.2","1.18.0-6ubuntu14.3","1.18.0-6ubuntu14.4","1.18.0-6ubuntu14.5","1.18.0-6ubuntu14.6","1.18.0-6ubuntu14.7","1.18.0-6ubuntu14.8","1.18.0-6ubuntu14.10","1.18.0-6ubuntu14.11","1.18.0-6ubuntu14.12","1.18.0-6ubuntu14.13","1.18.0-6ubuntu14.14"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-auth-pam","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-cache-purge","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-dav-ext","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-echo","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-fancyindex","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-geoip2","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-headers-more-filter","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-ndk","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-subs-filter","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-uploadprogress","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-upstream-fair","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-mail","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-nchan","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-rtmp","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-stream","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-stream-geoip","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"libnginx-mod-stream-geoip2","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"nginx","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"nginx-common","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"nginx-core","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"nginx-extras","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"nginx-full","binary_version":"1.18.0-6ubuntu14.15"},{"binary_name":"nginx-light","binary_version":"1.18.0-6ubuntu14.15"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8398-3.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-49975"}]}}},{"package":{"name":"nginx","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.24.0-2ubuntu7.12"}]}],"versions":["1.24.0-1ubuntu1","1.24.0-2ubuntu1","1.24.0-2ubuntu2","1.24.0-2ubuntu3","1.24.0-2ubuntu4","1.24.0-2ubuntu6","1.24.0-2ubuntu7","1.24.0-2ubuntu7.1","1.24.0-2ubuntu7.3","1.24.0-2ubuntu7.4","1.24.0-2ubuntu7.5","1.24.0-2ubuntu7.6","1.24.0-2ubuntu7.7","1.24.0-2ubuntu7.8","1.24.0-2ubuntu7.9","1.24.0-2ubuntu7.10","1.24.0-2ubuntu7.11"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"libnginx-mod-mail","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"libnginx-mod-stream","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"libnginx-mod-stream-geoip","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"nginx","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"nginx-common","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"nginx-core","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"nginx-extras","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"nginx-full","binary_version":"1.24.0-2ubuntu7.12"},{"binary_name":"nginx-light","binary_version":"1.24.0-2ubuntu7.12"}],"availability":"No 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