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 ngx_http_rewrite_module vulnerability

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 ngx_http_rewrite_module vulnerability

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...

Buffer overflow in the ngx_http_rewrite_module

Buffer overflow in the ngxhttprewritemodule Severity: medium CVE-2026-9256 Not vulnerable: 1.31.1+, 1.30.2+ Vulnerable: 0.1.17-1.31.0...

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 ...

K000161377: NGINX ngx_http_rewrite_module vulnerability CVE-2026-9256

Security Advisory Description 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...

OESA-2026-2407 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...

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...

OESA-2026-2405 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...

OESA-2026-2406 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...

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...

nginx -- heap buffer overflow in ngx_http_rewrite_module

The nginx developers report: A heap memory buffer overflow might occur in a worker process when using a configuration with overlapping captures in ngxhttprewritemodule, potentially resulting in arbitrary code execution CVE-2026-9256...

TencentOS Server 3: nginx:1.24 (TSSA-2026:0338)

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the TSSA-2026:0338 advisory. Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:...

CLSA-2026-1779367740 Fix CVE(s): CVE-2026-42945

SECURITY UPDATE: fix heap buffer overrun in ngxhttprewritemodule when rewrite is followed by set/if/rewrite with unnamed PCRE captures - debian/patches/CVE-2026-42945.patch: fix heap buffer overrun in ngxhttprewritemodule when rewrite is followed by set/if/rewrite with unnamed PCRE captures -...

nginx: Fix of CVE-2026-42945

CVE-2026-42945: fix heap buffer overflow in ngxhttprewritemodule...

Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS : nginx vulnerability (USN-8271-1)

The remote Ubuntu 22.04 LTS / 24.04 LTS / 25.10 / 26.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-8271-1 advisory. It was discovered that the nginx ngxhttprewritemodule component incorrectly handled certain rewrite directives. A remote attacker...

nginx: NGINX: Arbitrary Code Execution Vulnerability

A flaw was found in NGINX, specifically within the ngxhttprewritemodule. An unauthenticated attacker can exploit this vulnerability by sending crafted HTTP requests under specific rewrite configurations. This can lead to a heap buffer overflow in the NGINX worker process, which may result in...

nginx: NGINX: Arbitrary Code Execution Vulnerability

A flaw was found in NGINX, specifically within the ngxhttprewritemodule. An unauthenticated attacker can exploit this vulnerability by sending crafted HTTP requests under specific rewrite configurations. This can lead to a heap buffer overflow in the NGINX worker process, which may result in...