CVE-2026-26746

HIGH

OpenSourcePOS 3.4.1 - Local File Inclusion and Remote Code Execution via Invoice Type Manipulation

Title source: llm
STIX 2.1

Exploitation Summary

EIP tracks 2 public exploits for CVE-2026-26746. PoCs published by XiaomingX, hungnqdz.

AI-analyzed exploit summary This is a detailed technical writeup for CVE-2026-26746, explaining an LFI vulnerability in OpenSourcePOS 3.4.1 that can be escalated to RCE via malicious file uploads. It includes code analysis, PoC steps, and remediation advice.

Description

OpenSourcePOS 3.4.1 contains a Local File Inclusion (LFI) vulnerability in the Sales.php::getInvoice() function. An attacker can read arbitrary files on the web server by manipulating the Invoice Type configuration. This issue can be chained with the file upload functionality to achieve Remote Code Execution (RCE).

Exploits (2)

github WRITEUP 10 stars
by XiaomingX · pythonpoc
https://github.com/XiaomingX/data-cve-poc-py-v1/tree/main/2026/CVE-2026-26746

This is a detailed technical writeup for CVE-2026-26746, explaining an LFI vulnerability in OpenSourcePOS 3.4.1 that can be escalated to RCE via malicious file uploads. It includes code analysis, PoC steps, and remediation advice.

Classification
Writeup 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: OpenSourcePOS 3.4.1
Auth required
Prerequisites: authenticated access · ability to upload files
devstral-2 · analyzed Feb 27, 2026 Full analysis →
nomisec WRITEUP
by hungnqdz · poc
https://github.com/hungnqdz/CVE-2026-26746

This repository contains a detailed technical analysis of CVE-2026-26746, a Local File Inclusion (LFI) vulnerability in OpenSourcePOS 3.4.1 that can be escalated to Remote Code Execution (RCE). The writeup includes a root cause analysis, proof-of-concept steps, and remediation recommendations.

Classification
Writeup 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: OpenSourcePOS 3.4.1
Auth required
Prerequisites: Authenticated access to the OpenSourcePOS application · Ability to upload files (e.g., company logo) · Configuration access to modify the 'invoice_type' setting
devstral-2 · analyzed Feb 22, 2026 Full analysis →

References (2)

Core 2

Scores

CVSS v3 8.8
EPSS 0.0057
EPSS Percentile 42.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-434
Status published
Products (1)
opensourcepos/open_source_point_of_sale 3.4.1
Published Feb 20, 2026
Tracked Since Feb 21, 2026