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...

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...

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 1.31.1 NGINX Open Source versions 0.1.17 through 1.31.0 Description A flaw in the ngx http rewrite module module occurs when a rewrite directive utilizes a regex pattern with distinct, overlapping Perl-Compatible...

Astra Linux – Vulnerability in 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...

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...

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 of NGINX. The issue occurs when a rewrite directive is followed by a rewrite,...

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...

USN-7777-1: PCRE2 vulnerability

It was discovered that PCRE2 incorrectly handled the Scan SubString verb. An attacker could possibly use this issue to cause applications using PCRE2 to expose sensitive information...

PYSEC-2025-259

The PCRE2 library is a set of C functions that implement regular expression pattern matching. In version 10.45, a heap-buffer-overflow read vulnerability exists in the PCRE2 regular expression matching engine, specifically within the handling of the scs:... Scan SubString verb when combined with...