CVE-2026-9552: Das Parking Management System SQLi Flaw

CVE-2026-9552 Overview

CVE-2026-9552 is a SQL injection vulnerability in Das Parking Management System (停车场管理系统) version 6.2.0. The flaw resides in the Search API Endpoint, where the Value argument is passed unsanitized into a backend SQL query. Remote attackers can exploit the issue without authentication or user interaction. Public exploit details have been released, increasing the likelihood of opportunistic attacks. The vendor was contacted prior to disclosure but did not respond, leaving deployed instances without an official patch. 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 inject arbitrary SQL through the Search API, exposing parking records, user data, and potentially the underlying database server.

Affected Products

• Das Parking Management System (停车场管理系统) 6.2.0
• Search API Endpoint component
• Deployments exposing the Search API to untrusted networks

Discovery Timeline

• 2026-05-26 - CVE-2026-9552 published to NVD
• 2026-05-26 - Last updated in NVD database

Technical Details for CVE-2026-9552

Vulnerability Analysis

The vulnerability exists in the Search API Endpoint of Das Parking Management System 6.2.0. The endpoint accepts a Value parameter intended for filtering search results. The application concatenates this user-controlled input directly into a SQL query string instead of binding it as a parameter. As a result, an attacker can break out of the original query context and inject arbitrary SQL syntax.

The flaw maps to CWE-74, covering improper neutralization of special elements passed to downstream components. The attack vector is network-based, requires no privileges, and no user interaction. Public disclosure of exploitation details further lowers the barrier for adversaries.

Root Cause

The root cause is the absence of parameterized queries or input validation on the Value argument processed by the Search API. The backend trusts client-supplied input and constructs SQL statements through string concatenation. Special characters such as single quotes, semicolons, and SQL keywords are not escaped or rejected before query execution.

Attack Vector

An unauthenticated remote attacker sends a crafted HTTP request to the Search API Endpoint with malicious payloads in the Value parameter. Typical exploitation techniques include UNION-based extraction, boolean-based blind injection, and time-based blind injection. Successful exploitation allows attackers to read arbitrary database tables, modify records, or in some database configurations execute operating system commands. Refer to the VulDB Vulnerability #365611 entry and the Feishu Wiki Resource for additional technical context.

Detection Methods for CVE-2026-9552

Indicators of Compromise

• HTTP requests to the Search API Endpoint containing SQL metacharacters such as ', ", --, ;, UNION, or SLEEP( in the Value parameter.
• Database error messages returned in HTTP responses, indicating malformed SQL.
• Unusual outbound database connections or unexpected dumps of parking, user, or vehicle tables.

Detection Strategies

• Inspect web server and application logs for requests targeting the Search API with anomalous Value parameter content.
• Deploy Web Application Firewall (WAF) signatures aligned with OWASP CRS rules for SQL injection.
• Correlate database query logs with HTTP access logs to identify queries containing injected clauses.

Monitoring Recommendations

• Alert on repeated 500-series HTTP responses from the Search API, which often accompany blind SQL injection probing.
• Monitor for long-running or time-delayed database queries indicative of time-based blind injection.
• Track unauthenticated traffic patterns to API endpoints and flag spikes from single source IPs.

How to Mitigate CVE-2026-9552

Immediate Actions Required

• Restrict network access to the Das Parking Management System Search API to trusted internal networks or VPN-protected segments.
• Deploy a WAF with active SQL injection rules in blocking mode in front of the application.
• Audit database accounts used by the application and enforce least privilege, removing administrative rights.

Patch Information

No vendor patch is currently available. The vendor was contacted prior to public disclosure but did not respond. Administrators should monitor the VulDB Vulnerability #365611 entry for updates and apply vendor fixes immediately once released.

Workarounds

• Place the application behind a reverse proxy that filters or rejects requests containing SQL metacharacters in the Value parameter.
• Disable or block external access to the Search API Endpoint until a vendor patch is published.
• Implement database activity monitoring to alert on queries originating from the application that deviate from expected syntax patterns.