CVE-2026-9256-Poc

nginx ngxhttprewritemodule Heap Buffer Overflow Description nginx Plus and nginx Open Source ngxhttprewritemodule contains a heap buffer overflow vulnerability. When a rewrite directive uses a regex with multiple overlapping PCRE capture groups e.g. ^/.$ and a replacement referencing multiple...

NGINX-ngx_http_rewrite_module-heap-buffer-overflow-CVE-2026-9256

CVE-2026-9256 NGINX ngxhttprewritemodule PoC Derivation Process and Thoughts Scope: Only for local ranges, authorized reproduction environments, vulnerability verification, and protection rule analysis. Do not use against unauthorized targets. The PoC ideas in this document only verify remotely...

CVE-2026-42533

CVE-2026-42533 — nginx Heap Buffer Overflow PoC Exploit Pre-Authentication Remote Code Execution via Two-Pass Capture Clobbering Public PoC released 2026-07-27 — Don't wait, patch now. | ---|--- CVE| CVE-2026-42533 CVSS 4.0| 9.2 Critical Type| Heap Buffer Overflow CWE-122 Affected| nginx 0.9.6 –...

CVE-2026-96399 Gitea denial of service through external issue tracker patterns

A repository's external issue tracker regular expression containing alternating capture groups could produce invalid slice indexes when Gitea rendered issue references, causing a runtime panic that terminated the Gitea process. A user who can edit a repository's external issue tracker settings...

CLSA-2026-1779282813 Fix CVE(s): CVE-2026-42945

SECURITY UPDATE: heap buffer overflow in ngxhttprewritemodule when an unnamed PCRE capture group with '?' in the replacement is followed by another rewrite, if, or set directive - debian/patches/CVE-2026-42945.patch: clear isargs flag at the start of ngxhttpscriptregexendcode in...

CVE-2020-5243

uap-core before 0.7.3 is vulnerable to a denial of service attack when processing crafted User-Agent strings. Some regexes are vulnerable to regular expression denial of service REDoS due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent...

Babel security vulnerabilities

Babel is a compiler for JavaScript in the Babel open source. A security vulnerability exists in Babel versions prior to 7.26.10 and prior to 8.0.0-alpha.17, which stems from a .replace method generated when compiling regular expression named capture groups that has a quadratic complexity on certa...

CVE-2021-21317

uap-core in an open-source npm package which contains the core of BrowserScope's original user agent string parser. In uap-core before version 0.11.0, some regexes are vulnerable to regular expression denial of service REDoS due to overlapping capture groups. This allows remote attackers to...

GHSA-CMCX-XHR8-3W9P Denial of Service in uap-core when processing crafted User-Agent strings

Impact Some regexes are vulnerable to regular expression denial of service REDoS due to overlapping capture groups. This allows remote attackers to overload a server by setting the User-Agent header in an HTTPS request to maliciously crafted long strings. Patches Please update uap-core to gt;=...