EIP-2026-110634

PRE-CVE

PHP 8.1.0-dev - 'User-Agentt' Remote Code Execution

Title source: legacy

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-110634. PoCs published by flast101.

AI-analyzed exploit summary This exploit leverages a backdoor in PHP 8.1.0-dev where sending a crafted 'User-Agentt' header executes arbitrary commands via the `zerodiumsystem` function. It provides an interactive pseudo-shell by injecting commands into the header and parsing the response.

Description

PHP 8.1.0-dev - 'User-Agentt' Remote Code Execution

Exploits (1)

exploitdb WORKING POC VERIFIED

by flast101 · pythonwebappsphp

https://www.exploit-db.com/exploits/49933

View Code ZIP pw:eip

This exploit leverages a backdoor in PHP 8.1.0-dev where sending a crafted 'User-Agentt' header executes arbitrary commands via the `zerodiumsystem` function. It provides an interactive pseudo-shell by injecting commands into the header and parsing the response.

Classification

Working Poc 100%

Attack Type

Rce

Complexity

Trivial

Reliability

Reliable

Target: PHP 8.1.0-dev

No auth needed

Prerequisites: Target running PHP 8.1.0-dev with the backdoor present · Network access to the target host

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1059 - Command and Scripting Interpreter

devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve

Tracked Since Feb 18, 2026