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PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability

In some versions of PHP in certain configurations of FPM setup, it is possible to cause FPM module to write past allocated buffers allowing the possibility of remote code execution.

Published 8 Sep 2026Updated 8 Sep 2026981 sources
CVSS 9.8 ✓ VERIFIED REFERENCE△ CISA KEV
Overview Sources History

What happened

In some versions of PHP in certain configurations of FPM setup, it is possible to cause FPM module to write past allocated buffers allowing the possibility of remote code execution.

Affected versions

FastCGI Process Manager (FPM): See original advisory Fixed: See vendor advisory.

Why it matters

This source correlation may provide earlier visibility while structured CVE metadata is still being updated.

Detection & mitigation

  • Review the original advisory and validate affected versions.
  • Apply vendor-provided updates or mitigations when available.

Public PoC references

RepositoryAuthorFirst seenReference
Exploit-DB 48182PHP-FPM - Underflow Remote Code Execution (Metasploit)Metasploit2020-03-09VerifiedExploit-DB 47553PHP-FPM + Nginx - Remote Code ExecutionEmil Lerner2019-10-28VerifiedSploitusRCE in Nginx + php-fpm when fastcgi_split_path_info with %0a causes empty PATH_INFO.KitPloit2026-09-04T15:51:06Candidatekitploit.comRCE in Nginx + php-fpm when fastcgi_split_path_info with %0a causes empty PATH_INFO.ru2026-09-04T15:51:06CandidatePoC-in-GitHub · neex/phuip-fpizdamExploit for CVE-2019-11043★ 1833neex2019-09-23CandidatePoC-in-GitHub · B1gd0g/CVE-2019-11043CVE-2019-11043★ 0B1gd0g2019-10-23CandidatePoC-in-GitHub · tinker-li/CVE-2019-11043★ 0tinker-li2019-10-23CandidatePoC-in-GitHub · jas502n/CVE-2019-11043php-fpm+Nginx RCE★ 105jas502n2019-10-23CandidatePoC-in-GitHub · AleWong/PHP-FPM-Remote-Code-Execution-Vulnerability-CVE-2019-11043-PHP-FPM Remote Code Execution Vulnerability (CVE-2019-11043) POC in Python★ 4AleWong2019-10-24CandidatePoC-in-GitHub · ianxtianxt/CVE-2019-11043★ 0ianxtianxt2019-10-24CandidatePoC-in-GitHub · fairyming/CVE-2019-11043★ 1fairyming2019-10-24CandidatePoC-in-GitHub · akamajoris/CVE-2019-11043-Docker★ 27akamajoris2019-10-24CandidatePoC-in-GitHub · theMiddleBlue/CVE-2019-11043(PoC) Python version of CVE-2019-11043 exploit by neex★ 147theMiddleBlue2019-10-28CandidatePoC-in-GitHub · shadow-horse/cve-2019-11043CVE-2019-11043 PHP远程代码执行★ 1shadow-horse2019-10-28CandidatePoC-in-GitHub · huowen/CVE-2019-11043Python exp for CVE-2019-11043★ 5huowen2019-10-29CandidatePoC-in-GitHub · ypereirareis/docker-CVE-2019-11043Docker image and commands to check CVE-2019-11043 vulnerability on nginx/php-fpm applications.★ 8ypereirareis2019-10-30CandidatePoC-in-GitHub · MRdoulestar/CVE-2019-11043CVE-2019-11043 && PHP7.x && RCE EXP★ 3MRdoulestar2019-11-06CandidatePoC-in-GitHub · 0th3rs-Security-Team/CVE-2019-11043CVE-2019-11043 PHP7.x RCE★ 140th3rs-Security-Team2019-11-06CandidatePoC-in-GitHub · k8gege/CVE-2019-11043Ladon POC Moudle CVE-2019-11043 (PHP-FPM + Ngnix)★ 16k8gege2019-11-11CandidatePoC-in-GitHub · moniik/CVE-2019-11043_envremote debug environment for CLion★ 1moniik2019-11-17CandidatePoC-in-GitHub · kriskhub/CVE-2019-11043This repository provides a dockerized infrastructure and a python implementation of the CVE-2019-11043 exploit.★ 14kriskhub2020-05-05CandidatePoC-in-GitHub · alokaranasinghe/cve-2019-11043★ 0alokaranasinghe2020-05-12CandidatePoC-in-GitHub · corifeo/CVE-2019-11043quick and dirty PHP RCE proof of concept★ 0corifeo2020-07-13CandidatePoC-in-GitHub · lindemer/CVE-2019-11043PHP-FPM Remote Command Execution Exploit★ 4lindemer2020-11-18CandidatePoC-in-GitHub · jptr218/php_hackCVE-2019-11043★ 2jptr2182021-08-10CandidatePoC-in-GitHub · jas9reet/CVE-2019-11043CVE-2019-11043 LAB★ 0jas9reet2022-03-04CandidatePoC-in-GitHub · bayazid-bit/CVE-2019-11043CVE-2019–11043: PHP-FPM Nginx Remote Code Execution Vulnerability★ 0bayazid-bit2025-06-19CandidatePoC-in-GitHub · a1ex-var1amov/ctf-cve-2019-11043★ 0a1ex-var1amov2025-08-26CandidatePoC-in-GitHub · CodeHex083/phuip-fpizdamExploit for CVE-2019-11043★ 3CodeHex0832025-10-24CandidatePoC-in-GitHub · MagentaBear/CVE-2019-11043-Vulnerability★ 0MagentaBear2025-11-28CandidatePoC-in-GitHub · gon905332-jpg/cve-2019-11043.pyPython port of an ExploitDB proof-of-concept.★ 0gon905332-jpg2025-12-12Candidate
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