nginx: ngx_http_rewrite_module: code execution and denial of service

A flaw was found in the ngxhttprewritemodule module of NGINX. When a rewrite directive uses a regex pattern with distinct, overlapping Perl-Compatible Regular Expression PCRE captures and a replacement string that references multiple such captures in a redirect or arguments context, an...

nginx: ngx_http_rewrite_module: code execution and denial of service

A flaw was found in the ngxhttprewritemodule module of NGINX. When a rewrite directive uses a regex pattern with distinct, overlapping Perl-Compatible Regular Expression PCRE captures and a replacement string that references multiple such captures in a redirect or arguments context, an...

ALPINE-CVE-2026-9256

NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttprewritemodule 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...

UBUNTU-CVE-2026-9256

NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttprewritemodule 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...

CVE-2026-9256

NGINX Plus and NGINX Open Source expose a vulnerability in the ngx_http_rewrite_module when a rewrite directive uses distinct, overlapping PCRE captures (e.g., ^/((.*))$) and the replacement references multiple captures (e.g., $1$2) in redirects or arguments. An unauthenticated attacker can send ...

OESA-2026-2408 nginx security update

NGINX is a free, open-source, high-performance HTTP server and reverse proxy, as well as an IMAP/POP3 proxy server. Security Fixes: NGINX Plus and NGINX Open Source have a vulnerability in the ngxhttprewritemodule module. This vulnerability exists when the rewrite directive is followed by a...

PT-2026-42776

Name of the Vulnerable Software and Affected Versions NGINX Plus versions prior to 37.0.1.1 NGINX Plus versions prior to R32 P7 NGINX Plus versions prior to R36 P5 NGINX Open Source versions 0.1.17 through 1.30.1 NGINX Open Source versions prior to 1.31.1 Description A heap buffer overflow exists...

Astra Linux - уязвимость в pcre2

A out-of-bounds read vulnerability was discovered in the PCRE2 library, specifically in the pcre2jitcompile.c file’s compilexclassmatchingpath function. This issue relates to a Unicode property matching problem in JIT-compiled regular expressions. The vulnerability arises because the character is...

CVE-2026-42945: Imperva Customers Protected Against Critical NGINX Rewrite Module Vulnerability

TL;DR: Researchers recently disclosed CVE-2026-42945, a critical heap-based buffer overflow vulnerability affecting both NGINX Open Source and NGINX Plus. The flaw exists within the ngxhttprewritemodule component and can allow unauthenticated attackers to trigger denial-of-service conditions and...

VulnCheck KEV: CVE-2026-42945

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...

BIT-NGINX-GATEWAY-2026-42945 NGINX ngx_http_rewrite_module vulnerability

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...

EUVD-2026-30010

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...

CVE-2026-42945

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...

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...

PT-2026-40681

Name of the Vulnerable Software and Affected Versions NGINX Plus affected versions not specified NGINX Open Source versions 0.6.27 through 1.30.0 Description A heap buffer overflow exists in the ngx http rewrite module module of NGINX. The issue occurs when a rewrite directive is followed by a...

Astra Linux – Vulnerability in pcre3

In PCRE before version 8.44, libpcre allowed integer overflows due to a large number appearing after a ?C substring...

JLSEC-2026-177

libpcre in PCRE before 8.44 allows an integer overflow via a large number after a ?C substring...

JLSEC-2026-176

libpcre in PCRE before 8.43 allows a subject buffer over-read in JIT when UTF is disabled, and \X or \R has more than one fixed quantifier, a related issue to CVE-2019-20454...

MiracleLinux 7 : pcre-8.32-15.el7.1 (AXSA:2016-391:01)

The remote MiracleLinux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2016-391:01 advisory. Perl-compatible regular expression library. PCRE has its own native API, but a set of wrapper functions that are based on the POSIX API are also...

[SECURITY] Fedora 42 Update: pcre2-10.46-1.fc42

PCRE2 is a re-working of the original PCRE Perl-compatible regular expression library to provide an entirely new API. PCRE2 is written in C, and it has its own API. There are three sets of functions, one for the 8-bit library, which processes strings of bytes, one for the 16-bit library, which...