CVE-2026-1179: Yonyou KSOA 9.0 SQL Injection Vulnerability

CVE-2026-1179 Overview

A SQL injection vulnerability has been identified in Yonyou KSOA 9.0, specifically affecting the /kmf/user_popedom.jsp file within the HTTP GET Parameter Handler component. The vulnerability allows remote attackers to manipulate the folderid parameter to inject malicious SQL commands. This flaw can be exploited remotely without authentication, and the exploit has been made publicly available. The vendor was contacted regarding this disclosure but failed to respond.

Critical Impact

Remote SQL injection vulnerability allowing unauthorized database access and manipulation through the folderid parameter in Yonyou KSOA 9.0, with public exploit availability increasing risk of active exploitation.

Affected Products

• Yonyou KSOA 9.0
• HTTP GET Parameter Handler component (/kmf/user_popedom.jsp)

Discovery Timeline

• 2026-01-19 - CVE-2026-1179 published to NVD
• 2026-01-19 - Last updated in NVD database

Technical Details for CVE-2026-1179

Vulnerability Analysis

This SQL injection vulnerability exists in the HTTP GET Parameter Handler of Yonyou KSOA 9.0. The vulnerable endpoint /kmf/user_popedom.jsp fails to properly sanitize user-supplied input in the folderid parameter before incorporating it into SQL queries. This allows an attacker to inject arbitrary SQL commands that are then executed by the backend database.

The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which encompasses injection flaws where user input is not properly validated or escaped before being used in a sensitive context. In this case, the downstream component is the SQL database engine.

The network-accessible nature of this vulnerability combined with no authentication requirements makes it particularly dangerous for internet-facing deployments of KSOA. Successful exploitation could lead to unauthorized data access, data modification, or in some cases, complete database compromise.

Root Cause

The root cause of this vulnerability is improper input validation and lack of parameterized queries in the /kmf/user_popedom.jsp file. The folderid parameter value is directly concatenated into SQL query strings without sanitization or the use of prepared statements, allowing attackers to break out of the intended query structure and inject their own SQL commands.

Attack Vector

The attack vector is network-based, allowing remote exploitation without any user interaction or authentication. An attacker can craft malicious HTTP GET requests to the vulnerable endpoint, embedding SQL injection payloads within the folderid parameter. Since the exploit is publicly available, attackers can readily leverage existing proof-of-concept code to target vulnerable installations.

The vulnerability can be exploited by sending specially crafted GET requests to the /kmf/user_popedom.jsp endpoint with malicious SQL syntax in the folderid parameter. For example, an attacker might append SQL operators, UNION SELECT statements, or time-based blind injection payloads to extract sensitive data or manipulate database contents. Technical details and proof-of-concept information can be found in the GitHub CVE Issue Discussion.

Detection Methods for CVE-2026-1179

Indicators of Compromise

• HTTP GET requests to /kmf/user_popedom.jsp containing SQL syntax characters such as single quotes, semicolons, UNION, SELECT, or comment sequences in the folderid parameter
• Unusual database query patterns or errors in application logs related to the user_popedom.jsp endpoint
• Unexpected database access patterns or data exfiltration attempts from systems running Yonyou KSOA
• Error messages revealing database structure or SQL syntax errors in web server responses

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns targeting the folderid parameter
• Implement database activity monitoring to identify anomalous queries originating from the KSOA application
• Configure intrusion detection systems (IDS) to alert on HTTP requests containing common SQL injection payloads to KSOA endpoints
• Enable detailed logging for the /kmf/user_popedom.jsp endpoint and analyze for suspicious parameter values

Monitoring Recommendations

• Continuously monitor web server access logs for requests to /kmf/user_popedom.jsp with abnormal parameter lengths or special characters
• Implement database query logging to track and alert on unusual SQL statement patterns from the KSOA application
• Set up real-time alerting for multiple failed or suspicious requests to the vulnerable endpoint from the same source IP
• Conduct periodic reviews of database user permissions to detect unauthorized privilege escalation

How to Mitigate CVE-2026-1179

Immediate Actions Required

• Restrict network access to the /kmf/user_popedom.jsp endpoint using firewall rules or network segmentation
• Implement input validation on the folderid parameter to accept only expected values (e.g., numeric IDs)
• Deploy a Web Application Firewall with SQL injection detection rules in front of the KSOA application
• Consider temporarily disabling the affected functionality if it is not business-critical until a patch is available

Patch Information

No official patch has been released by the vendor at this time. According to the vulnerability disclosure, the vendor (Yonyou) was contacted early about this issue but did not respond. Organizations should monitor the VulDB Entry #341773 for updates and check with Yonyou for any future security advisories.

Workarounds

• Implement strict input validation that only allows alphanumeric characters or specific expected formats in the folderid parameter
• Use a reverse proxy or WAF to filter malicious SQL injection payloads before they reach the application
• Restrict access to the KSOA application to trusted internal networks only, removing external network exposure
• Apply the principle of least privilege to the database account used by KSOA to minimize the impact of successful exploitation

# Example WAF rule to block SQL injection attempts (ModSecurity format)
SecRule ARGS:folderid "@detectSQLi" \
    "id:100001,\
    phase:2,\
    block,\
    msg:'SQL Injection attempt detected in folderid parameter',\
    log,\
    auditlog"