CVE-2026-14648: Online Voting System SQLi Vulnerability

CVE-2026-14648 Overview

CVE-2026-14648 is a SQL injection vulnerability in code-projects Online Voting System up to version 0.x/1.0. The flaw resides in the test_input function of /authentication.php within the Login component. Attackers can manipulate the adminUserName and adminPassword parameters to inject arbitrary SQL statements. The vulnerability is exploitable remotely without authentication or user interaction, and a public proof-of-concept has been disclosed. The issue is categorized under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Unauthenticated remote attackers can inject SQL via the admin login form to bypass authentication and read or modify backend database contents.

Affected Products

code-projects Online Voting System 0.x
code-projects Online Voting System 1.0
Component: Login (/authentication.php)

Discovery Timeline

2026-07-04 - CVE-2026-14648 published to NVD
2026-07-06 - Last updated in NVD database

Technical Details for CVE-2026-14648

Vulnerability Analysis

The vulnerability stems from unsafe handling of user-supplied credentials in the administrative login flow of code-projects Online Voting System. The test_input helper in /authentication.php is intended to sanitize incoming request parameters, but fails to neutralize SQL metacharacters before the values reach the database query. Attackers submit crafted values for adminUserName or adminPassword, and the raw input becomes part of the final SQL statement executed by the backend.

Because authentication occurs before any authorization checks, exploitation requires no valid account. The attack originates over the network against the login endpoint, which is typically exposed on the same interface as the voting portal.

Root Cause

The root cause is improper neutralization of special elements passed into a downstream SQL interpreter [CWE-74]. The test_input routine does not enforce parameterized queries or context-aware escaping. String concatenation of untrusted parameters into the authentication SQL statement allows attackers to break out of the intended string context and append additional clauses.

Attack Vector

An unauthenticated attacker sends an HTTP POST request to /authentication.php with malicious payloads in the adminUserName or adminPassword fields. A classic tautology such as ' OR '1'='1 in either field alters the WHERE clause of the authentication query, returning a truthy result and granting administrative access. UNION-based payloads can additionally exfiltrate voter records, credentials, and configuration data from the database.

A public proof-of-concept script is available at the GitHub Gist PoC Script. Additional technical details are indexed at VulDB CVE-2026-14648.

Detection Methods for CVE-2026-14648

Indicators of Compromise

POST requests to /authentication.php containing SQL metacharacters such as single quotes, OR 1=1, UNION SELECT, or comment tokens (--, #) in adminUserName or adminPassword.
Successful admin sessions immediately following malformed login attempts from the same source IP.
Unexpected database errors or verbose SQL warnings in application logs tied to the login endpoint.
Outbound queries returning voter or credential tables to the web tier at times inconsistent with normal admin workflows.

Detection Strategies

Deploy a web application firewall rule that inspects adminUserName and adminPassword parameters for SQL injection signatures.
Enable database query logging and alert on UNION, SLEEP, or boolean-based patterns originating from the authentication path.
Correlate login endpoint access with unusually long request bodies or high request rates from a single client.

Monitoring Recommendations

Aggregate web server, application, and database logs into a centralized analytics platform for cross-source correlation.
Monitor for successful admin authentications preceded by repeated 500-series errors on /authentication.php.
Track outbound data volume from the database server and alert on spikes correlated with login activity.

How to Mitigate CVE-2026-14648

Immediate Actions Required

Restrict network access to the administrative login page using IP allowlists or a VPN until a fixed release is available.
Rotate all administrator credentials and audit the admin user table for unauthorized entries.
Review database logs for evidence of prior exploitation and treat any anomalous admin sessions as compromised.
Add virtual patching rules at the WAF to block SQL metacharacters on the affected parameters.

Patch Information

No official vendor patch is referenced in the NVD advisory for CVE-2026-14648 at the time of publication. Operators of code-projects Online Voting System should monitor the Code Projects Overview page for updates. Until a fix is released, the code owner should replace concatenated SQL in /authentication.php with parameterized queries or prepared statements and enforce input validation on all admin login parameters.

Workarounds

Replace string concatenation in /authentication.php with prepared statements using PDO or MySQLi bound parameters.
Implement server-side input validation that rejects non-alphanumeric characters in username fields before they reach the database layer.
Place the application behind a WAF configured with OWASP Core Rule Set SQL injection signatures.
Enforce least-privilege database accounts so the web application cannot read or modify tables outside its required scope.

bash

# Example WAF rule (ModSecurity) blocking SQLi on the login endpoint
SecRule REQUEST_URI "@streq /authentication.php" \
  "phase:2,chain,deny,status:403,id:1026148,\
   msg:'CVE-2026-14648 SQLi attempt on Online Voting System login'"
  SecRule ARGS:adminUserName|ARGS:adminPassword \
    "@detectSQLi" "t:none,t:urlDecodeUni"