{"id":"USN-8563-1","summary":"nginx vulnerabilities","details":"It was discovered that nginx incorrectly handled certain map directives\nusing regex matching and capture variables. A remote attacker could use\nthis issue to cause nginx to crash, resulting in a denial of service, or\npossibly execute arbitrary code. (CVE-2026-42533)\n\nIt was discovered that nginx had a use-after-free vulnerability in the\nngx_http_ssi_module module when configured with Server-Side Includes,\nproxy_pass, and proxy buffering disabled directives. An attacker able to\nintercept traffic and control responses from an upstream server could\npossibly use this issue to cause nginx to crash, resulting in a denial of\nservice. (CVE-2026-56434)\n\nIt was discovered that nginx incorrectly handled certain requests in the\nngx_http_slice_module module. A remote attacker could possibly use this\nissue to obtain sensitive information or cause nginx to crash, resulting\nin a denial of service. (CVE-2026-60005)","modified":"2026-07-21T18:19:57.105021051Z","published":"2026-07-20T12:17:44Z","related":["UBUNTU-CVE-2026-42533","UBUNTU-CVE-2026-56434","UBUNTU-CVE-2026-60005"],"upstream":["UBUNTU-CVE-2026-42533","UBUNTU-CVE-2026-56434","UBUNTU-CVE-2026-60005"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8563-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-42533"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-56434"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-60005"}],"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":"1.18.0-6ubuntu14.17"}]}],"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","1.18.0-6ubuntu14.15","1.18.0-6ubuntu14.16"],"ecosystem_specific":{"binaries":[{"binary_name":"libnginx-mod-http-auth-pam","binary_version":"1.18.0-6ubuntu14.17"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-http-cache-purge"},{"binary_name":"libnginx-mod-http-dav-ext","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"libnginx-mod-http-echo","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"libnginx-mod-http-fancyindex","binary_version":"1.18.0-6ubuntu14.17"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-http-geoip"},{"binary_name":"libnginx-mod-http-geoip2","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"libnginx-mod-http-headers-more-filter","binary_version":"1.18.0-6ubuntu14.17"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-http-image-filter"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-http-ndk"},{"binary_name":"libnginx-mod-http-perl","binary_version":"1.18.0-6ubuntu14.17"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-http-subs-filter"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-http-uploadprogress"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-http-upstream-fair"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-http-xslt-filter"},{"binary_name":"libnginx-mod-mail","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"libnginx-mod-nchan","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"libnginx-mod-rtmp","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"libnginx-mod-stream","binary_version":"1.18.0-6ubuntu14.17"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-stream-geoip"},{"binary_version":"1.18.0-6ubuntu14.17","binary_name":"libnginx-mod-stream-geoip2"},{"binary_name":"nginx","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"nginx-common","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"nginx-core","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"nginx-extras","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"nginx-full","binary_version":"1.18.0-6ubuntu14.17"},{"binary_name":"nginx-light","binary_version":"1.18.0-6ubuntu14.17"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-56434","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-60005","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H","type":"CVSS_V3"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8563-1.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":"1.24.0-2ubuntu7.14"}]}],"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","1.24.0-2ubuntu7.12","1.24.0-2ubuntu7.13"],"ecosystem_specific":{"availability":"No 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subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8563-1.json","cves_map":{"cves":[{"id":"CVE-2026-56434","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-60005","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"Ubuntu","score":"medium"}]}],"ecosystem":"Ubuntu:26.04:LTS"}}}],"schema_version":"1.7.5"}