Fedora 42: nginx-mod-modsecurity Critical Memory Leak Risk CVE-2025-53859

The ModSecurity-nginx connector is the connection point between nginx and

libmodsecurity (ModSecurity v3). Said another way, this project provides a

communication channel between nginx and libmodsecurity. This connector is

required to use LibModSecurity with nginx.

The ModSecurity-nginx connector takes the form of an nginx module. The module

simply serves as a layer of communication between nginx and ModSecurity

Changes with nginx 1.28.1 23 Dec 2025 *) Security: processing of a specially crafted login/password when using the "none" authentication method in the ngx_mail_smtp_module might cause worker process memory disclosure to the authentication server (CVE-2025-53859). *) Bugfix: a segmentation fault might occur in a worker process if the "try_files" directive and "proxy_pass" with a URI were used. *) Bugfix: in handling "Host" and ":authority" header lines with equal values when using HTTP/2; the bug had appeared in 1.17.9. *) Bugfix: in handling "Host" header lines with a port when using HTTP/3. *) Bugfix: an XCLIENT command didn't use the xtext encoding. Thanks to Igor Morgenstern of Aisle Research. *) Bugfix: in SSL certificate caching during reconfiguration. *) Bugfix: in delta-seconds processing in the "Cache-Control" backend response header line. *) Change: the native nginx/Windows binary release is now ...