EIP-2026-103156

PRE-CVE

Lighttpd 1.4.17 - FastCGI Header Overflow Arbitrary Code Execution

Title source: legacy

Exploitation Summary

EIP tracks 1 public exploit for EIP-2026-103156. PoCs published by Andi.

AI-analyzed exploit summary This exploit targets a buffer overflow vulnerability in Lighttpd's FastCGI module (versions <= 1.4.17). It crafts a malicious HTTP POST request with manipulated FastCGI headers to trigger a heap-based overflow, potentially leading to remote code execution.

Description

Lighttpd 1.4.17 - FastCGI Header Overflow Arbitrary Code Execution

Exploits (1)

exploitdb WORKING POC VERIFIED

by Andi · cremotelinux

https://www.exploit-db.com/exploits/4437

View Code ZIP pw:eip

This exploit targets a buffer overflow vulnerability in Lighttpd's FastCGI module (versions <= 1.4.17). It crafts a malicious HTTP POST request with manipulated FastCGI headers to trigger a heap-based overflow, potentially leading to remote code execution.

Classification

Working Poc 95%

Attack Type

Rce

Complexity

Moderate

Reliability

Reliable

Target: Lighttpd <= 1.4.17 with FastCGI enabled

No auth needed

Prerequisites: Network access to the target server · FastCGI module enabled in Lighttpd

MITRE ATT&CK

T1190 - Exploit Public-Facing Application T1203 - Exploitation for Client Execution

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

Details

Status pre_cve

Tracked Since Feb 18, 2026