CVE-2026-79573: L-ONE v1.0.0 SQL Injection Vulnerability

CVE-2026-79573 Overview

CVE-2026-79573 identifies multiple SQL injection vulnerabilities in L-ONE v1.0.0. The flaws reside in the /attachment/getBusinessUploadList component and can be triggered through the busid, id, and taskid request parameters. Attackers can inject crafted SQL statements to read sensitive information from the backend database.

The vulnerability class falls under [CWE-89] Improper Neutralization of Special Elements used in an SQL Command. The National Vulnerability Database published this entry on September 8, 2026, with a last modification on September 9, 2026.

Critical Impact
Unauthenticated or authenticated attackers can extract arbitrary database contents from L-ONE v1.0.0 by injecting SQL through the busid, id, or taskid parameters of /attachment/getBusinessUploadList.

Affected Products

L-ONE v1.0.0
/attachment/getBusinessUploadList component
Deployments exposing the busid, id, or taskid request parameters

Discovery Timeline

2026-09-08 - CVE-2026-79573 published to the NVD
2026-09-09 - Last updated in the NVD database

Technical Details for CVE-2026-79573

Vulnerability Analysis

The /attachment/getBusinessUploadList endpoint in L-ONE v1.0.0 accepts three user-controlled parameters: busid, id, and taskid. Each parameter feeds directly into a backend SQL query without sufficient input neutralization. As a result, an attacker can append or modify SQL clauses to alter the query's execution logic.

Successful exploitation exposes database records including business data, user identifiers, and any other tables reachable by the application's database account. Because three separate injection points exist in a single endpoint, filter-based mitigations must cover every parameter to prevent bypass.

The public proof of concept, published in the referenced GitHub PoC Repository, links the L-ONE codebase to JFinalOA. Administrators deploying JFinalOA-derived builds should treat them as affected until confirmed otherwise.

Root Cause

The root cause is missing parameterization in the data access layer of /attachment/getBusinessUploadList. User input from busid, id, and taskid is concatenated into SQL strings rather than bound through prepared statements. No allow-list validation constrains the values to expected numeric or GUID formats.

Attack Vector

An attacker sends an HTTP request to /attachment/getBusinessUploadList with a malicious value in busid, id, or taskid. Typical payloads include union-based, boolean-based blind, or time-based blind SQL injection techniques. The technical write-up in the GitHub PoC Repository documents working payloads.

No verified exploitation code is republished here. Refer to the linked advisory for parameter-level payload structure and response handling details.

Detection Methods for CVE-2026-79573

Indicators of Compromise

HTTP requests to /attachment/getBusinessUploadList containing SQL metacharacters such as ', --, UNION, SLEEP(, or BENCHMARK( in the busid, id, or taskid parameters.
Unusual database query latency or error responses correlated with requests to the vulnerable endpoint.
Outbound data volumes from the L-ONE application server that exceed baseline for administrative attachment queries.

Detection Strategies

Deploy web application firewall rules that flag SQL keywords and comment sequences in the busid, id, and taskid parameters of the affected endpoint.
Enable database query logging and alert on queries against attachment or business tables that contain concatenated tautologies such as OR 1=1.
Correlate application access logs with database audit logs to identify anomalous multi-row extraction from a single session.

Monitoring Recommendations

Monitor authentication events preceding requests to /attachment/getBusinessUploadList to identify session hijacking or brute-forced accounts.
Track error-rate spikes on the L-ONE application, which often accompany blind SQL injection probing.
Retain HTTP request and response bodies for the affected endpoint to support post-incident analysis.

How to Mitigate CVE-2026-79573

Immediate Actions Required

Restrict network access to the L-ONE /attachment/getBusinessUploadList endpoint to trusted internal users until a vendor patch is applied.
Deploy WAF signatures that block SQL metacharacters in the busid, id, and taskid parameters.
Rotate database credentials used by the L-ONE application and audit the account's privileges to enforce least privilege.
Review database and application logs for prior exploitation attempts against the vulnerable endpoint.

Patch Information

No vendor advisory or patch release is listed in the enriched CVE data at the time of publication. Administrators should monitor the L-ONE project channels and the referenced GitHub PoC Repository for remediation guidance. Until a fix is available, apply the workarounds below.

Workarounds

Replace dynamic SQL concatenation in the /attachment/getBusinessUploadList handler with parameterized queries or prepared statements.
Enforce strict server-side validation that constrains busid, id, and taskid to expected numeric or identifier formats.
Run the L-ONE database account with read-only privileges on non-attachment tables to limit blast radius.
Disable the affected endpoint if it is not required for production business workflows.

bash

# Example WAF rule concept (ModSecurity) blocking SQLi tokens on the vulnerable endpoint
SecRule REQUEST_URI "@beginsWith /attachment/getBusinessUploadList" \
    "chain,phase:2,deny,status:403,id:1026079573,msg:'CVE-2026-79573 SQLi attempt'"
    SecRule ARGS:busid|ARGS:id|ARGS:taskid \
        "@rx (?i)(union(\s|/\*.*\*/)+select|sleep\s*\(|benchmark\s*\(|--|';)"