CVE-2026-40812: SQL Injection Vulnerability in getLiveValues

CVE-2026-40812 Overview

CVE-2026-40812 is an unauthenticated SQL Injection vulnerability [CWE-89] affecting the getLiveValues function. The flaw stems from improper neutralization of special elements supplied through the sn parameter within a SQL SELECT command. A remote attacker can inject crafted SQL syntax without authentication, leading to a total loss of confidentiality of the underlying database. The issue is tracked under CERT-VDE Advisory VDE-2026-044.

Critical Impact
An unauthenticated remote attacker can extract arbitrary data from the backend database through SQL injection in the sn parameter of the getLiveValues function.

Affected Products

Product details disclosed in CERT-VDE Advisory VDE-2026-044
Specific vendor and version information: Not Available in NVD data
Refer to the CERT-VDE advisory for the authoritative list of affected components

Discovery Timeline

2026-05-27 - CVE-2026-40812 published to NVD
2026-05-27 - Last updated in NVD database

Technical Details for CVE-2026-40812

Vulnerability Analysis

The vulnerability resides in the getLiveValues function, which accepts user-controlled input through the sn parameter. The function passes this input into a SQL SELECT statement without proper sanitization or parameterization. As a result, an attacker can break out of the intended query context and append arbitrary SQL clauses.

The attack requires no authentication, no user interaction, and is exploitable over the network. The primary impact is confidentiality. Attackers can enumerate database schemas, extract records, and potentially exfiltrate credentials or sensitive operational data.

The EPSS probability for this CVE is currently low, but unauthenticated network-reachable SQL injection flaws are routinely targeted by opportunistic scanners once disclosed.

Root Cause

The root cause is improper neutralization of special elements used in a SQL command [CWE-89]. The sn parameter is concatenated directly into a SQL query rather than being passed through a prepared statement or parameterized API. Special characters such as single quotes, comments, and statement separators are not escaped or rejected before query execution.

Attack Vector

The attack vector is network-based. An attacker sends a crafted HTTP request to the endpoint exposing the getLiveValues function. The malicious payload is delivered through the sn query parameter. Because authentication is not required, any actor with network reachability to the affected service can attempt exploitation.

A conceptual attack flow involves appending UNION-based or boolean-based SQL clauses to the sn parameter. The attacker iterates over the response to enumerate tables and exfiltrate column data. No exploitation code is published in the NVD entry, and no public proof-of-concept is currently listed.

Detection Methods for CVE-2026-40812

Indicators of Compromise

HTTP requests targeting the getLiveValues endpoint with anomalous characters in the sn parameter, such as single quotes, UNION SELECT, --, ;, or /* sequences
Unusually long or URL-encoded sn parameter values originating from external IP addresses
Database errors or non-standard response sizes correlated with getLiveValues requests in web server logs

Detection Strategies

Deploy web application firewall signatures that inspect the sn parameter for SQL metacharacters and known injection patterns
Monitor application and database logs for malformed SQL queries, syntax errors, and unexpected UNION, SLEEP, or BENCHMARK operations
Correlate repeated requests to getLiveValues from a single source with response anomalies to identify automated injection scanners

Monitoring Recommendations

Enable verbose query logging on the backend database to capture parameter values reaching SQL SELECT statements
Alert on outbound data transfers from the application server that deviate from baseline volume
Track authentication-free endpoints exposed to the internet and prioritize them for anomaly detection

How to Mitigate CVE-2026-40812

Immediate Actions Required

Review the CERT-VDE Advisory VDE-2026-044 and identify whether affected products are deployed in your environment
Restrict network access to the vulnerable service so that only trusted management networks can reach the getLiveValues endpoint
Apply vendor-supplied patches as soon as they are made available through the CERT-VDE advisory

Patch Information

Vendor patch details are coordinated through CERT-VDE Advisory VDE-2026-044. Operators should consult the advisory for fixed versions and update procedures. At the time of NVD publication, no patch URL was indexed directly in the NVD record.

Workarounds

Place the affected service behind a web application firewall configured to block SQL metacharacters in the sn parameter
Segment the application from untrusted networks using firewall rules or VPN-only access until a patch is applied
Disable or restrict access to the getLiveValues endpoint at the reverse proxy layer if business operations permit

bash

# Example reverse proxy rule to block suspicious sn parameter values
# nginx configuration snippet
location /getLiveValues {
    if ($arg_sn ~* "(\'|--|;|union|select|sleep|benchmark)") {
        return 403;
    }
    proxy_pass http://backend;
}