{"id":"USN-8210-1","summary":"nginx vulnerabilities","details":"It was discovered that the nginx ngx_mail_auth_http_module module\nincorrectly handled certain requests. An attacker could possibly use this\nissue to cause nginx to crash, resulting in a denial of service.\n(CVE-2026-27651)\n\nIt was discovered that the nginx ngx_http_dav_module module incorrectly\nhandled certain destination URIs. An attacker could use this issue to cause\nnginx to crash, resulting in a denial of service, or possibly modify source\nor destination names outside of the document root. (CVE-2026-27654)\n\nIt was discovered that the nginx ngx_http_mp4_module module incorrectly\nhandled certain MP4 files. An attacker could use this issue to cause nginx\nto crash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2026-27784, CVE-2026-32647)\n\nIt was discovered that the nginx ngx_mail_smtp_module module incorrectly\nhandled certain CRLF sequences. An attacker could possibly use this issue\nto inject arbitrary SMTP headers. (CVE-2026-28753)\n\nIt was discovered that the nginx ngx_stream_ssl_module module incorrectly\nhandled revoked certificates. This could result in successful TLS\nhandshakes even after an OCSP check identifies a certificate as revoked,\ncontrary to expectations. This issue only affected Ubuntu 24.04 LTS and\nUbuntu 25.10. (CVE-2026-28755)","modified":"2026-04-28T16:44:27.865946382Z","published":"2026-04-27T12:28:20Z","related":["UBUNTU-CVE-2026-27651","UBUNTU-CVE-2026-27654","UBUNTU-CVE-2026-27784","UBUNTU-CVE-2026-28753","UBUNTU-CVE-2026-28755","UBUNTU-CVE-2026-32647"],"upstream":["CVE-2026-27651","CVE-2026-27654","CVE-2026-27784","CVE-2026-28753","CVE-2026-28755","CVE-2026-32647","UBUNTU-CVE-2026-27651","UBUNTU-CVE-2026-27654","UBUNTU-CVE-2026-27784","UBUNTU-CVE-2026-28753","UBUNTU-CVE-2026-28755","UBUNTU-CVE-2026-32647"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8210-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-27651"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-27654"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-27784"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-28753"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-28755"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-32647"}],"affected":[{"package":{"name":"nginx","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/nginx@1.18.0-6ubuntu14.10?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-6ubuntu14.10"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnginx-mod-http-auth-pam","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-cache-purge","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-dav-ext","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-echo","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-fancyindex","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-geoip2","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-headers-more-filter","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-ndk","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-subs-filter","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-uploadprogress","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-upstream-fair","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-mail","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-nchan","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-rtmp","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-stream","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-stream-geoip","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"libnginx-mod-stream-geoip2","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"nginx","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"nginx-common","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"nginx-core","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"nginx-extras","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"nginx-full","binary_version":"1.18.0-6ubuntu14.10"},{"binary_name":"nginx-light","binary_version":"1.18.0-6ubuntu14.10"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8210-1.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":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-27651"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-27654"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-27784"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-28753"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-32647"}]}}},{"package":{"name":"nginx","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/nginx@1.24.0-2ubuntu7.7?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.24.0-2ubuntu7.7"}]}],"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"],"ecosystem_specific":{"availability":"No 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