{"id":"CLSA-2026-1791460658","summary":"Fix CVE(s): CVE-2026-42055","details":"   * SECURITY UPDATE: buffer overflow in the gRPC upstream request builder via\n     overlong HTTP/2 header fields\n     - debian/patches/CVE-2026-42055.patch: reject a method name, URI, host,\n       configured header name or value, or forwarded client header name or\n       value longer than NGX_HTTP_V2_MAX_FIELD in\n       ngx_http_grpc_create_request(), so an oversized field can no longer\n       overflow the HPACK integer encoding the request buffer was sized for\n     - CVE-2026-42055","modified":"2026-10-26T09:32:06.369011451Z","published":"2026-10-08T11:57:52Z","upstream":["CVE-2026-42055"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/ubuntu20.04els/CLSA-2026-1791460658.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42055"}],"affected":[{"package":{"name":"libnginx-mod-http-auth-pam","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-auth-pam?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-cache-purge","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-cache-purge?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-dav-ext","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-dav-ext?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-echo","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-echo?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-fancyindex","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-fancyindex?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-geoip","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-geoip?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-geoip2","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-geoip2?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-headers-more-filter","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-headers-more-filter?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-image-filter","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-image-filter?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-lua","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-lua?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-ndk","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-ndk?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu20.04els/CLSA-2026-1791460658.json"}},{"package":{"name":"libnginx-mod-http-perl","ecosystem":"TuxCare:Ubuntu:20.04","purl":"pkg:deb/tuxcare/libnginx-mod-http-perl?distro=ubuntu-20.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.18.0-0ubuntu1.7+tuxcare.els9"}]}],"database_specif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