When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address allowing for bypass of authorization or bypass of rate limiting.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

When NGINX Plus or NGINX Open Source are configured to use the HTTP/3 ...

Security update for nginx

Security update for nginx

Important: nginx:1.24 security, bug fix, and enhancement update

Important: nginx:1.26 security, bug fix, and enhancement update

Important: nginx:1.24 security, bug fix, and enhancement update

Important: nginx security, bug fix, and enhancement update

Important: nginx security, bug fix, and enhancement update

Important: nginx security update

Important: nginx:1.26 security update

Important: nginx:1.24 security update

Important: nginx:1.24 security update

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_rewrite_module module. This vulnerability exists when a rewrite directive uses a regex pattern with distinct, overlapping Perl-Compatible Regular Expression (PCRE) captures (for example, ^/((.*))$) and a replacement string that references multiple such captures (for example, $1$2) in a redirect or arguments context. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_proxy_v2_module and ngx_http_grpc_module modules. This vulnerability exists when the proxy_http_version to 2 or grpc_pass directives are used to proxy HTTP/2 traffic, the ignore_invalid_headers directive is set to off, and the large_client_header_buffers directive size is larger than 2 megabytes. A remote, unauthenticated attacker, along with conditions beyond their control, could send large headers while creating an upstream request. This may cause a heap-based buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

ELSA-2026-38847: nginx:1.24 security, bug fix, and enhancement update (IMPORTANT)

ELSA-2026-36639: nginx:1.26 security, bug fix, and enhancement update (IMPORTANT)

ELSA-2026-36618: nginx:1.24 security, bug fix, and enhancement update (IMPORTANT)

ELSA-2026-36364: nginx security, bug fix, and enhancement update (IMPORTANT)