CVE-2026-9584: Project Management System SQLi Vulnerability

CVE-2026-9584 Overview

CVE-2026-9584 is a SQL injection vulnerability in code-projects Project Management System 1.0. The flaw resides in an unknown function within the chk.php file, which is part of the application's Login component. Attackers can manipulate input parameters to inject arbitrary SQL statements into the underlying database query. The vulnerability is exploitable remotely without authentication or user interaction. Public disclosure of the exploit has occurred, increasing the likelihood of opportunistic attacks against exposed deployments. The weakness 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 into the login flow, potentially exposing credentials and database contents.

Affected Products

• code-projects Project Management System 1.0
• Vulnerable file: chk.php (Login component)
• Deployments exposing the login endpoint over the network

Discovery Timeline

• 2026-05-26 - CVE-2026-9584 published to NVD
• 2026-05-27 - Last updated in NVD database

Technical Details for CVE-2026-9584

Vulnerability Analysis

The vulnerability exists in chk.php, the script that handles login validation in code-projects Project Management System 1.0. User-supplied input from the login form reaches a SQL query without proper sanitization or parameterization. Attackers can submit crafted payloads in login parameters to alter the structure of the executed query. Successful exploitation allows attackers to bypass authentication, enumerate database records, or extract stored credentials. Because the affected endpoint is the login page, no prior account or session is required to launch the attack.

Root Cause

The root cause is improper neutralization of special elements in SQL statements, mapped to [CWE-74]. The chk.php script concatenates untrusted request parameters directly into a SQL query string. Prepared statements or parameter binding are not used, allowing attacker-controlled characters such as single quotes and SQL keywords to alter query semantics.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker sends a crafted HTTP request to the login endpoint backed by chk.php. The malicious payload modifies the query logic to return unintended data or evaluate as true, granting access or leaking information. Because the exploit has been publicly disclosed via VulDB Vulnerability #365640, unsophisticated actors can replicate the attack using existing payloads.

No verified exploit code is republished here. Refer to the GitHub CVE Submission Guide for the disclosure write-up.

Detection Methods for CVE-2026-9584

Indicators of Compromise

• HTTP POST requests to chk.php containing SQL metacharacters such as ', --, UNION, or OR 1=1.
• Unusual authentication success events without matching prior failed attempts in application logs.
• Database errors or stack traces referencing chk.php in web server logs.

Detection Strategies

• Inspect web server access logs for requests to chk.php containing encoded or raw SQL syntax in POST bodies or query strings.
• Enable database query logging and alert on malformed queries originating from the login handler.
• Deploy a Web Application Firewall (WAF) rule set targeting SQL injection patterns against the login URL.

Monitoring Recommendations

• Monitor for repeated failed login attempts followed by anomalous successful logins from the same source IP.
• Track outbound database connections from the web application for unusual SELECT volumes or schema enumeration queries.
• Alert on HTTP 500 responses from chk.php, which often indicate injection probing.

How to Mitigate CVE-2026-9584

Immediate Actions Required

• Restrict network access to the Project Management System login page using IP allowlists or VPN-only access until a fix is applied.
• Deploy WAF signatures that block SQL injection payloads targeting chk.php.
• Review database accounts used by the application and reduce privileges to the minimum required.

Patch Information

No vendor patch has been published in the referenced advisories at the time of NVD publication. Monitor the Code Projects Resource Hub and the VulDB Vulnerability #365640 entry for updates.

Workarounds

• Modify chk.php to use parameterized queries or prepared statements via mysqli or PDO instead of string concatenation.
• Apply server-side input validation to reject characters not required for usernames or passwords.
• Remove the application from public-facing networks if it is not actively required.

# Example WAF rule (ModSecurity) blocking common SQLi patterns against chk.php
SecRule REQUEST_URI "@endsWith /chk.php" \
    "phase:2,deny,status:403,id:1009584,\
    msg:'Possible SQLi targeting CVE-2026-9584',\
    chain"
    SecRule ARGS "@rx (?i)(union(\s)+select|or\s+1=1|--|';)" \
        "t:none,t:urlDecodeUni"