CVE-2026-7632: Hospital Management System SQLi Flaw

CVE-2026-7632 Overview

CVE-2026-7632 is a SQL injection vulnerability in code-projects Online Hospital Management System 1.0. The flaw resides in the /viewappointment.php script, which fails to sanitize the delid request parameter before passing it into a database query. An unauthenticated remote attacker can manipulate this parameter to inject arbitrary SQL statements. Public exploit details, including a time-based blind SQL injection technique, have been disclosed on GitHub. The weakness is classified under CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component.

Critical Impact

Unauthenticated remote attackers can extract, modify, or delete patient and appointment records by injecting SQL through the delid parameter of viewappointment.php.

Affected Products

• code-projects Online Hospital Management System 1.0
• The /viewappointment.php endpoint specifically
• Deployments using the unmodified upstream source from code-projects.org

Discovery Timeline

• 2026-05-02 - CVE-2026-7632 published to NVD
• 2026-05-05 - Last updated in NVD database

Technical Details for CVE-2026-7632

Vulnerability Analysis

The vulnerability exists in the appointment management workflow of Online Hospital Management System 1.0. The viewappointment.php script accepts a delid HTTP parameter that identifies an appointment record for deletion or display. The application concatenates this parameter directly into a SQL query without parameterization or input validation. As a result, attacker-controlled SQL fragments execute within the database session of the web application.

Public proof-of-concept material describes a time-based blind SQL injection variant. Attackers can use conditional SLEEP() payloads to infer database contents one bit at a time when no direct error or output channel is exposed. The attack requires no authentication, no user interaction, and can be carried out over the network.

Root Cause

The root cause is improper neutralization of special elements in a downstream SQL component [CWE-74]. The delid parameter is interpolated into a query string rather than being bound through prepared statements. The application also lacks defense-in-depth controls such as input type validation, allowlisting, or use of an ORM with parameter binding.

Attack Vector

Exploitation occurs over the network against any reachable instance of viewappointment.php. An attacker issues an HTTP request that supplies a malicious value in the delid query string parameter. Typical payloads include boolean-based, union-based, or time-based blind SQL injection strings. Successful exploitation enables disclosure of database contents, modification of appointment and patient records, and potential authentication bypass through credential extraction.

For technical exploitation steps, see the GitHub CVE-2026-7632 Documentation and the companion GitHub Time Blind SQL Exploit write-up.

Detection Methods for CVE-2026-7632

Indicators of Compromise

• HTTP requests to /viewappointment.php containing SQL keywords such as UNION, SELECT, SLEEP, BENCHMARK, or comment markers like -- and # in the delid parameter.
• Web server access logs showing unusually long response times for viewappointment.php requests, which suggest time-based blind SQL injection.
• Database error messages or stack traces referencing the appointment table appearing in application logs after malformed delid values.
• Repeated requests to /viewappointment.php from a single source iterating values in delid, consistent with automated tools such as sqlmap.

Detection Strategies

• Deploy a Web Application Firewall (WAF) signature that inspects the delid parameter for SQL metacharacters and known injection payloads.
• Enable database query logging and alert on queries containing concatenated delid values that include SQL control keywords.
• Correlate web access logs with database audit logs to identify request-to-query pairs that deviate from the expected single-row appointment lookup pattern.

Monitoring Recommendations

• Monitor for HTTP 500 errors and abnormal latency spikes on viewappointment.php as primary signals of injection probing.
• Track outbound DNS or HTTP traffic from the database host that could indicate out-of-band data exfiltration.
• Alert on access patterns from non-browser User-Agent strings such as sqlmap, curl, or empty User-Agent headers targeting the affected endpoint.

How to Mitigate CVE-2026-7632

Immediate Actions Required

• Restrict network access to the Online Hospital Management System until a fix is applied, placing the application behind authentication or VPN where possible.
• Deploy WAF rules to block requests where delid contains non-numeric characters, since the parameter should only carry an integer record identifier.
• Audit existing database accounts used by the application and remove unnecessary privileges such as FILE, CREATE, or administrative roles.
• Review web and database logs for prior exploitation attempts targeting /viewappointment.php.

Patch Information

No official vendor patch has been published for CVE-2026-7632 in the references available. Organizations running code-projects Online Hospital Management System 1.0 should monitor the code-projects website and the VulDB Vulnerability #360578 entry for vendor updates. Until a patch is released, source-level remediation is required: rewrite the affected query in viewappointment.php to use prepared statements with bound parameters and enforce strict integer casting on delid.

Workarounds

• Modify viewappointment.php to cast delid to an integer with intval($_GET['delid']) or equivalent before use in any SQL statement.
• Replace concatenated SQL queries with parameterized queries using PDO or mysqli prepared statements.
• Apply the principle of least privilege to the database account used by the application, limiting it to SELECT, INSERT, UPDATE, and DELETE on required tables only.
• Add a virtual patching rule at the WAF that rejects any value of delid not matching the regular expression ^[0-9]+$.

# Example ModSecurity rule to block non-numeric delid values
SecRule ARGS:delid "!@rx ^[0-9]+$" \
    "id:1026763201,\
    phase:2,\
    deny,\
    status:400,\
    msg:'CVE-2026-7632: Non-numeric delid parameter blocked',\
    tag:'CWE-74',\
    tag:'sql-injection'"