CVE-2026-40701

NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttpsslmodule module when the sslverifyclient directive is set to "on" or "optional," and the sslocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacke...

CVE-2026-42945

CVE-2026-42945 affects NGINX Open Source and NGINX Plus via the ngx_http_rewrite_module when a rewrite/if/set directive is followed by a PCRE capture and a replacement containing a question mark. This can cause a heap buffer overflow in the worker process and, on systems with ASLR disabled, poten...

K000160932: Quarterly Security Notification (May 2026)

Security Advisory Description On May 13, 2026, F5 announced the following security issues. This document is intended to serve as an overview of these vulnerabilities to help determine the impact to your F5 devices. You can find the details of each issue in the associated articles. You can watch t...

K000161027: NGINX ngx_http_scgi_module and ngx_http_uwsgi_module vulnerability CVE-2026-42946

Security Advisory Description A vulnerability exists in the ngxhttpscgimodule and ngxhttpuwsgimodule modules that may result in excessive memory allocation or an over-read of data. When scgipass or uwsgipass is configured, an unauthenticated attacker with man-in-the-middle MITM ability to control...

K000161131: NGINX ngx_http_proxy_v2_module vulnerability CVE-2026-42926

Security Advisory Description When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxyhttpversion to 2, and also uses proxysetbody , an attacker may be able to inject frame headers and payload bytes to the upstream peer. CVE-2026-42926 Impact This vulnerability allows a remot...

K000161028: NGINX ngx_http_charset_module vulnerability CVE-2026-42934

Security Advisory Description NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttpcharsetmodule module. When charset , sourcecharset , and charsetmap and proxypass with disabled buffering "off" directives are configured, unauthenticated attackers can send requests that with...

K000161021: NGINX ngx_http_ssl_module vulnerability CVE-2026-40701

Security Advisory Description NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttpsslmodule module when the sslverifyclient directive is set to "on" or "optional," and the sslocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this...

K000161019: NGINX ngx_http_rewrite_module vulnerability CVE-2026-42945

Security Advisory Description NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttprewritemodule module. This vulnerability exists when the "rewrite" directive with a query string is followed in the same location by the "if" or "set" directive with an unnamed Perl-Compatible Regula...

F5 NGINX Plus和F5 NGINX Open Source 资源管理错误漏洞

F5 NGINX Plus and F5 NGINX Open Source are both products of the American company F5. F5 NGINX Plus is a software-based application delivery platform. F5 NGINX Open Source is a high-performance web server, reverse proxy server, load balancer, and API gateway. Both F5 NGINX Plus and F5 NGINX Open...

CVE-2026-42945: Heap-based Buffer Overflow

NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttprewritemodule module. This vulnerability exists when the rewrite directive is followed by a rewrite, if, or set directive and an unnamed Perl-Compatible Regular Expression PCRE capture for example, $1, $2 with a replacement strin...

F5 NGINX Plus和F5 NGINX Open Source 安全漏洞

F5 NGINX Plus and F5 NGINX Open Source are both products of the American company F5. F5 NGINX Plus is a software-based application delivery platform. F5 NGINX Open Source is a high-performance web server, reverse proxy server, load balancer, and API gateway. Both F5 NGINX Plus and F5 NGINX Open...

PT-2026-40681

Name of the Vulnerable Software and Affected Versions NGINX Plus and NGINX Open Source versions 0.6.27 through 1.30.0 Description A heap buffer overflow exists in the ngx http rewrite module module. The issue occurs when a rewrite directive is followed by a rewrite, if, or set directive and...

PT-2026-40682

Name of the Vulnerable Software and Affected Versions NGINX affected versions not specified Description An issue in the ngx http scgi module and ngx http uwsgi module modules can lead to excessive memory allocation or an over-read of data. When scgi pass or uwsgi pass is configured, an...

PT-2026-40677

Name of the Vulnerable Software and Affected Versions NGINX Open Source versions prior to 1.30.0 Description When configured to proxy HTTP/2 traffic by setting proxy http version to 2 and utilizing proxy set body, an attacker may inject frame headers and payload bytes to the upstream peer...

CVE-2026-42946: Memory Allocation with Excessive Size Value

A vulnerability exists in the ngxhttpscgimodule and ngxhttpuwsgimodule modules that may result in excessive memory allocation or an over-read of data. When scgipass or uwsgipass is configured, an unauthenticated attacker with man-in-the-middle MITM ability to control responses from an upstream...

CVE-2026-42934: Out-of-bounds Read

NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttpcharsetmodule module. When charset, sourcecharset, and charsetmap and proxypass with disabled buffering "off" directives are configured, unauthenticated attackers can send requests that with conditions beyond the attackers' contr...

CVE-2026-42926: Encoding Error

When NGINX Open Source is configured to proxy HTTP/2 traffic by setting proxyhttpversion to 2, and also uses proxysetbody, an attacker may be able to inject frame headers and payload bytes to the upstream peer. Note: Software versions which have reached End of Technical Support EoTS are not...

CVE-2026-40701: Use After Free

NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttpsslmodule module when the sslverifyclient directive is set to "on" or "optional," and the sslocsp directive is set to "on" or the leaf parameters are configured with a resolver. With this configuration, an unauthenticated attacke...

CVE-2026-40460: Authentication Bypass by Spoofing

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...

PT-2026-40648

Name of the Vulnerable Software and Affected Versions NGINX Plus affected versions not specified NGINX Open Source affected versions not specified Description When configured to use the HTTP/3 QUIC module, an attacker may be able to spoof their source IP address. This can lead to the bypass of...