{"id":"USN-8354-1","summary":"nginx vulnerabilities","details":"It was discovered that nginx did not properly validate source addresses in\nthe HTTP/3 QUIC module. A remote attacker could possibly use this issue to\nbypass authorization checks or rate limiting. This issue only affected\nUbuntu 25.04 and Ubuntu 25.10. (CVE-2026-40460)\n\nIt was discovered that nginx contained a use-after-free vulnerability in\nthe ngx_http_ssl_module module when client certificate verification and\nOCSP validation were enabled. A remote attacker could use this issue to\ncause nginx to crash, resulting in a denial of service, or possibly modify\ndata in memory. (CVE-2026-40701)\n\nIt was discovered that nginx did not properly handle certain proxied\nresponses in the ngx_http_charset_module module. A remote attacker could\npossibly use this issue to obtain sensitive information or cause nginx to\ncrash, resulting in a denial of service. (CVE-2026-42934)\n\nIt was discovered that nginx did not properly process certain SCGI and\nuWSGI responses. An attacker able to perform a machine-in-the-middle attack\ncould possibly use this issue to obtain sensitive information or cause\nnginx to crash, resulting in a denial of service. (CVE-2026-42946)\n\nIt was discovered that nginx incorrectly handled certain rewrite rules in\nthe ngx_http_rewrite_module module. A remote attacker could use this issue\nto cause nginx to crash, resulting in a denial of service, or possibly\nexecute arbitrary code. (CVE-2026-9256)","modified":"2026-06-22T09:31:35.449144109Z","published":"2026-06-01T13:52:07Z","related":["UBUNTU-CVE-2026-40460","UBUNTU-CVE-2026-40701","UBUNTU-CVE-2026-42934","UBUNTU-CVE-2026-42946","UBUNTU-CVE-2026-9256"],"upstream":["UBUNTU-CVE-2026-9256","UBUNTU-CVE-2026-40460","UBUNTU-CVE-2026-40701","UBUNTU-CVE-2026-42934","UBUNTU-CVE-2026-42946"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8354-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-9256"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-40460"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-40701"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42934"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42946"}],"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":"1.18.0-6ubuntu14.12"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-auth-pam","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-cache-purge","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-dav-ext","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-echo","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-fancyindex","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-geoip2","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-headers-more-filter","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-ndk","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-subs-filter","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-uploadprogress","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-upstream-fair","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-mail","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-nchan","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-rtmp","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-stream","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-stream-geoip","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"libnginx-mod-stream-geoip2","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"nginx","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"nginx-common","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"nginx-core","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"nginx-extras","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"nginx-full","binary_version":"1.18.0-6ubuntu14.12"},{"binary_name":"nginx-light","binary_version":"1.18.0-6ubuntu14.12"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-9256","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-40701","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-42934","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-42946","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:22.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8354-1.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.24.0-2ubuntu7.9"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"libnginx-mod-mail","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"libnginx-mod-stream","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"libnginx-mod-stream-geoip","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"nginx","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"nginx-common","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"nginx-core","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"nginx-extras","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"nginx-full","binary_version":"1.24.0-2ubuntu7.9"},{"binary_name":"nginx-light","binary_version":"1.24.0-2ubuntu7.9"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-9256","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-40701","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-42934","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-42946","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8354-1.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.0-6ubuntu1.4"}]}],"versions":["1.26.3-2ubuntu1","1.26.3-3ubuntu1","1.26.3-3ubuntu2","1.26.3-3ubuntu3","1.28.0-3ubuntu1","1.28.0-4ubuntu1","1.28.0-6ubuntu1","1.28.0-6ubuntu1.1","1.28.0-6ubuntu1.2","1.28.0-6ubuntu1.3"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"libnginx-mod-mail","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"libnginx-mod-stream","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"libnginx-mod-stream-geoip","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"nginx","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"nginx-common","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"nginx-core","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"nginx-extras","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"nginx-full","binary_version":"1.28.0-6ubuntu1.4"},{"binary_name":"nginx-light","binary_version":"1.28.0-6ubuntu1.4"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"cves":[{"id":"CVE-2026-9256","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-40460","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-40701","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-42934","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:L"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-42946","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:25.10"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8354-1.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.3-2ubuntu1.2"}]}],"versions":["1.28.0-6ubuntu1","1.28.1-2ubuntu1","1.28.1-3ubuntu1","1.28.2-2ubuntu1","1.28.3-2ubuntu1","1.28.3-2ubuntu1.1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"libnginx-mod-mail","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"libnginx-mod-stream","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"libnginx-mod-stream-geoip","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"nginx","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"nginx-common","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"nginx-core","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"nginx-extras","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"nginx-full","binary_version":"1.28.3-2ubuntu1.2"},{"binary_name":"nginx-light","binary_version":"1.28.3-2ubuntu1.2"}],"availability":"No 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