CVE-2026-84109: Xinhu Rainrock RockOA SQL Injection Flaw

CVE-2026-84109 Overview

CVE-2026-84109 is a SQL injection vulnerability in Xinhu Rainrock RockOA through version 2.7.6. The flaw resides in the getOrder function within webmain/webmainAction.php. Attackers can manipulate the highorder argument to inject arbitrary SQL statements. The vulnerability is remotely exploitable and requires low privileges. Public exploit code exists, increasing the likelihood of opportunistic exploitation. The vendor was contacted before disclosure but did not respond, so no official patch is currently available. The weakness is classified under CWE-74 (Improper Neutralization of Special Elements in Output).

Critical Impact
Authenticated remote attackers can inject SQL commands through the highorder parameter, potentially exposing or modifying application database contents.

Affected Products

Xinhu Rainrock RockOA versions up to and including 2.7.6
Component: webmain/webmainAction.php
Vulnerable function: getOrder

Discovery Timeline

2026-09-01 - CVE-2026-84109 published to NVD
2026-09-01 - Last updated in NVD database

Technical Details for CVE-2026-84109

Vulnerability Analysis

The vulnerability is a SQL injection flaw in the getOrder function of Xinhu Rainrock RockOA, an office automation application. The highorder request parameter flows directly into a dynamically constructed SQL statement without proper neutralization. An authenticated user can supply crafted input that alters query semantics. Successful exploitation can disclose or modify records in the underlying database. The attack is launched over the network and requires only low-privileged access to the application.

Root Cause

The root cause is improper neutralization of special elements passed to a downstream SQL interpreter (CWE-74). The getOrder function accepts the highorder argument and incorporates it into an ORDER BY clause or similar SQL context without parameterization or allow-list validation. ORDER BY positions typically cannot be bound as prepared statement parameters, which often leads developers to concatenate user input directly into the query.

Attack Vector

An authenticated attacker sends an HTTP request to the RockOA endpoint that invokes the getOrder action within webmainAction.php. The request supplies a malicious value for the highorder parameter, embedding SQL syntax such as CASE WHEN conditional expressions or subqueries. The database engine executes the injected logic, returning inferred data through response timing, ordering behavior, or error output. Public exploit material is referenced on the GitHub CVE Issue Tracker and the VulDB Vulnerability Details page.

Detection Methods for CVE-2026-84109

Indicators of Compromise

HTTP requests to webmainAction.php containing the highorder parameter with SQL keywords such as SELECT, UNION, CASE, SLEEP, or IF(.
Web server access logs showing repeated calls to the getOrder action with abnormally long or encoded highorder values.
Database query logs containing unusual ORDER BY expressions or nested subqueries originating from the RockOA application user.

Detection Strategies

Deploy web application firewall signatures that inspect the highorder parameter for SQL metacharacters and known injection payloads.
Enable database query auditing to flag queries from the RockOA service account that contain conditional expressions in ORDER BY clauses.
Correlate authenticated session identifiers against anomalous query volumes or response-time variance indicative of blind SQL injection.

Monitoring Recommendations

Alert on repeated failed logins followed by requests to webmainAction.php, which may indicate credential stuffing before exploitation.
Monitor for outbound data transfer spikes from the RockOA database host after suspicious getOrder requests.
Track process and file access on the application server for signs of secondary payloads dropped after successful injection.

How to Mitigate CVE-2026-84109

Immediate Actions Required

Restrict network access to RockOA administrative interfaces using firewall rules or VPN gating until a vendor patch is available.
Enforce strong authentication and rotate credentials for all RockOA accounts, since exploitation requires low-privileged authenticated access.
Deploy a WAF rule that rejects requests to webmainAction.php when the highorder parameter contains SQL syntax characters.

Patch Information

As of publication, Xinhu has not issued a security advisory or patch. The VulDB record states that the vendor was contacted early but did not respond. Refer to the VulDB CVE Record for updates on vendor remediation status.

Workarounds

Apply a reverse-proxy input filter that validates highorder against a strict allow-list of expected column names or numeric indices.
Disable or remove access to the getOrder endpoint if it is not required by business workflows.
Reduce database privileges for the RockOA application account to the minimum needed, limiting the impact of successful injection.

bash

# Example NGINX rule blocking SQL metacharacters in the highorder parameter
location ~* /webmain/webmainAction\.php {
    if ($arg_highorder ~* "(select|union|sleep|case|--|/\*|;)") {
        return 403;
    }
    proxy_pass http://rockoa_backend;
}