EIP-2026-104703

PRE-CVE

PHP 5.3 - 'mail.log' Configuration Option 'open_basedir' Restriction Bypass

Title source: legacy
STIX 2.1

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-104703. PoCs published by Maksymilian Arciemowicz.

AI-analyzed exploit summary This exploit demonstrates an 'open_basedir' restriction bypass in PHP 5.3.0 by leveraging a design error in the mail() function to write files in unauthorized locations. It is particularly effective in shared-hosting environments where 'safe_mode' and 'open_basedir' restrictions are expected to isolate users.

Description

PHP 5.3 - 'mail.log' Configuration Option 'open_basedir' Restriction Bypass

Exploits (1)

exploitdb WORKING POC VERIFIED
by Maksymilian Arciemowicz · phplocalphp
https://www.exploit-db.com/exploits/33161

This exploit demonstrates an 'open_basedir' restriction bypass in PHP 5.3.0 by leveraging a design error in the mail() function to write files in unauthorized locations. It is particularly effective in shared-hosting environments where 'safe_mode' and 'open_basedir' restrictions are expected to isolate users.

Classification
Working Poc 90%
Attack Type
Info Leak
Complexity
Trivial
Reliability
Reliable
Target: PHP 5.3.0
No auth needed
Prerequisites: PHP 5.3.0 installed · Shared-hosting environment with 'open_basedir' restrictions
devstral-2 · analyzed Feb 16, 2026 Full analysis →

Details

Status pre_cve
Tracked Since Feb 18, 2026