{"id":"USN-8271-1","summary":"nginx vulnerability","details":"It was discovered that the nginx ngx_http_rewrite_module component\nincorrectly handled certain rewrite directives. A remote attacker could use\nthis issue to cause nginx to crash, resulting in a denial of service, or\npossibly execute arbitrary code.","modified":"2026-06-29T13:51:19.388256944Z","published":"2026-05-14T12:03:04Z","related":["UBUNTU-CVE-2026-42945"],"upstream":["UBUNTU-CVE-2026-42945"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8271-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42945"}],"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":"1.18.0-6ubuntu14.11"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-auth-pam","binary_version":"1.18.0-6ubuntu14.11"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-http-cache-purge"},{"binary_name":"libnginx-mod-http-dav-ext","binary_version":"1.18.0-6ubuntu14.11"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-http-echo"},{"binary_name":"libnginx-mod-http-fancyindex","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"libnginx-mod-http-geoip2","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"libnginx-mod-http-headers-more-filter","binary_version":"1.18.0-6ubuntu14.11"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-http-image-filter"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-http-ndk"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-http-perl"},{"binary_name":"libnginx-mod-http-subs-filter","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"libnginx-mod-http-uploadprogress","binary_version":"1.18.0-6ubuntu14.11"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-http-upstream-fair"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-http-xslt-filter"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-mail"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-nchan"},{"binary_version":"1.18.0-6ubuntu14.11","binary_name":"libnginx-mod-rtmp"},{"binary_name":"libnginx-mod-stream","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"libnginx-mod-stream-geoip","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"libnginx-mod-stream-geoip2","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"nginx","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"nginx-common","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"nginx-core","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"nginx-extras","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"nginx-full","binary_version":"1.18.0-6ubuntu14.11"},{"binary_name":"nginx-light","binary_version":"1.18.0-6ubuntu14.11"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-42945","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","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_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"high"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8271-1.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":"1.24.0-2ubuntu7.8"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.24.0-2ubuntu7.8"},{"binary_version":"1.24.0-2ubuntu7.8","binary_name":"libnginx-mod-http-image-filter"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.24.0-2ubuntu7.8"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.24.0-2ubuntu7.8"},{"binary_version":"1.24.0-2ubuntu7.8","binary_name":"libnginx-mod-mail"},{"binary_version":"1.24.0-2ubuntu7.8","binary_name":"libnginx-mod-stream"},{"binary_version":"1.24.0-2ubuntu7.8","binary_name":"libnginx-mod-stream-geoip"},{"binary_name":"nginx","binary_version":"1.24.0-2ubuntu7.8"},{"binary_version":"1.24.0-2ubuntu7.8","binary_name":"nginx-common"},{"binary_name":"nginx-core","binary_version":"1.24.0-2ubuntu7.8"},{"binary_name":"nginx-extras","binary_version":"1.24.0-2ubuntu7.8"},{"binary_version":"1.24.0-2ubuntu7.8","binary_name":"nginx-full"},{"binary_version":"1.24.0-2ubuntu7.8","binary_name":"nginx-light"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2026-42945","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_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"Ubuntu","score":"high"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8271-1.json"}},{"package":{"name":"nginx","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/nginx?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.28.0-6ubuntu1.3"}]}],"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"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnginx-mod-http-geoip","binary_version":"1.28.0-6ubuntu1.3"},{"binary_name":"libnginx-mod-http-image-filter","binary_version":"1.28.0-6ubuntu1.3"},{"binary_version":"1.28.0-6ubuntu1.3","binary_name":"libnginx-mod-http-perl"},{"binary_name":"libnginx-mod-http-xslt-filter","binary_version":"1.28.0-6ubuntu1.3"},{"binary_version":"1.28.0-6ubuntu1.3","binary_name":"libnginx-mod-mail"},{"binary_name":"libnginx-mod-stream","binary_version":"1.28.0-6ubuntu1.3"},{"binary_name":"libnginx-mod-stream-geoip","binary_version":"1.28.0-6ubuntu1.3"},{"binary_version":"1.28.0-6ubuntu1.3","binary_name":"nginx"},{"binary_name":"nginx-common","binary_version":"1.28.0-6ubuntu1.3"},{"binary_version":"1.28.0-6ubuntu1.3","binary_name":"nginx-core"},{"binary_version":"1.28.0-6ubuntu1.3","binary_name":"nginx-extras"},{"binary_name":"nginx-full","binary_version":"1.28.0-6ubuntu1.3"},{"binary_name":"nginx-light","binary_version":"1.28.0-6ubuntu1.3"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:25.10","cves":[{"id":"CVE-2026-42945","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_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"Ubuntu","score":"high"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8271-1.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":"1.28.3-2ubuntu1.1"}]}],"versions":["1.28.0-6ubuntu1","1.28.1-2ubuntu1","1.28.1-3ubuntu1","1.28.2-2ubuntu1","1.28.3-2ubuntu1"],"ecosystem_specific":{"availability":"No 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