CVE-2026-86164 Overview
CVE-2026-86164 is a SQL injection vulnerability in itsourcecode Sales and Inventory System 1.0. The flaw resides in the /pages/trans_view.php script, where the ID parameter is passed to a database query without proper sanitization. Remote attackers with low-level privileges can manipulate the parameter to inject arbitrary SQL statements. The issue is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The exploit has been publicly released, increasing the likelihood of opportunistic attacks against exposed installations.
Critical Impact
Authenticated remote attackers can execute arbitrary SQL queries against the backend database, potentially reading, modifying, or deleting inventory and sales records.
Affected Products
- itsourcecode Sales and Inventory System 1.0
- The vulnerable component is /pages/trans_view.php
- No official vendor patch is referenced in the advisory
Discovery Timeline
- 2026-09-06 - CVE-2026-86164 published to NVD
- 2026-09-08 - Last updated in NVD database
Technical Details for CVE-2026-86164
Vulnerability Analysis
The vulnerability exists in the transaction view page of the Sales and Inventory System. The ID argument supplied via HTTP request is concatenated directly into a SQL query executed against the backend database. Because the application performs no parameterization or input validation, attackers can break out of the intended query context and append their own SQL clauses. Public exploit disclosure means proof-of-concept payloads are already circulating on tracking sites such as VulDB Vulnerability #399289 and the GitHub Issue #4 Discussion. Attackers can chain the injection with UNION SELECT statements to exfiltrate data or use time-based payloads to blindly enumerate schema information.
Root Cause
The root cause is unsanitized user input flowing into a dynamic SQL statement. The trans_view.php script accepts the ID parameter directly from the request and concatenates it into a database query without prepared statements, bound parameters, or type casting. This pattern is common in legacy PHP applications that rely on string interpolation rather than PDO or mysqli prepared statements.
Attack Vector
Exploitation requires network access to the affected web application and a low-privilege authenticated session. An attacker submits a crafted request to /pages/trans_view.php with a malicious ID value containing SQL syntax. No user interaction beyond the attacker's own request is required. The vulnerability described in the VulDB CVE-2026-86164 entry affects the confidentiality, integrity, and availability of the database at a limited scope.
No verified exploit code is reproduced here. Refer to the VulDB Vulnerability #399289 CTI entry for technical indicators associated with the public proof of concept.
Detection Methods for CVE-2026-86164
Indicators of Compromise
- Web server access log entries containing requests to /pages/trans_view.php with SQL metacharacters such as ', --, UNION, SELECT, or SLEEP( in the ID parameter
- Unexpected database errors originating from the trans_view.php handler
- Anomalous outbound data volumes from the database server following requests to the vulnerable endpoint
Detection Strategies
- Deploy web application firewall rules that flag SQL syntax in query string parameters on trans_view.php
- Enable database query logging and alert on queries referencing sensitive tables initiated from the transaction view page
- Correlate authenticated session activity with unusual query patterns to identify low-privilege accounts abusing the endpoint
Monitoring Recommendations
- Monitor HTTP request rates and payload sizes to /pages/trans_view.php for spikes indicative of automated scanning
- Track failed database queries associated with the PHP application user
- Alert on new or unexpected outbound connections from the web or database tier following requests to the vulnerable route
How to Mitigate CVE-2026-86164
Immediate Actions Required
- Restrict network access to the Sales and Inventory System until a fix is applied, exposing it only to trusted networks or via VPN
- Audit application logs for prior exploitation attempts against /pages/trans_view.php
- Rotate database credentials and review database user privileges to enforce least privilege for the application account
Patch Information
No official vendor patch is referenced in the advisory sources at the time of publication. Track the IT Source Code Homepage and the VulDB Submission #895549 record for future updates. Until a vendor fix is released, operators should apply the workarounds below or replace the affected component.
Workarounds
- Modify trans_view.php to use mysqli or PDO prepared statements with bound parameters for the ID value
- Cast the ID parameter to an integer before use in any SQL statement if the value is expected to be numeric
- Deploy a web application firewall signature that blocks SQL injection payloads targeting the vulnerable endpoint
- Disable or remove the transaction view page if it is not required for business operations
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
