CVE-2026-56287: Apache Fineract SQLi Vulnerability

CVE-2026-56287 Overview

CVE-2026-56287 is a boolean-based SQL Injection vulnerability [CWE-89] in Apache Fineract's Client Search API. The flaw affects the GET /api/v1/clients endpoint in versions up to and including 1.14.0. The orderBy and sortOrder request parameters are concatenated into a SQL query without sufficient validation. An authenticated user with permission to view clients can inject arbitrary SQL via a crafted orderBy value. Attackers can extract data through blind boolean-based techniques. On MySQL or MariaDB backends, adversaries can also read arbitrary files accessible to the database process using the LOAD_FILE() function.

Critical Impact
Authenticated attackers can extract sensitive database contents and, on MySQL/MariaDB deployments, read arbitrary files readable by the database service account.

Affected Products

Apache Fineract versions up to and including 1.14.0
Deployments using MySQL or MariaDB backends (increased impact via LOAD_FILE())
Any Fineract instance exposing the /api/v1/clients endpoint to authenticated users

Discovery Timeline

2026-07-15 - CVE CVE-2026-56287 published to NVD
2026-07-15 - Last updated in NVD database

Technical Details for CVE-2026-56287

Vulnerability Analysis

Apache Fineract is an open-source core banking platform used by financial institutions and microfinance organizations. The Client Search API accepts sorting parameters that control the ordering of returned records. The application concatenates the orderBy and sortOrder values directly into the SQL query string executed against the backing database.

Because these parameters bypass parameterized query handling, an authenticated caller can inject SQL fragments that alter query logic. The injection point is boolean-controllable, allowing attackers to infer database contents one bit at a time by observing differential API responses. On MySQL and MariaDB deployments, the LOAD_FILE() function further extends impact by returning file contents readable by the database process.

Root Cause

The root cause is improper neutralization of special elements used in SQL commands. Sorting identifiers cannot use parameter binding directly, but the affected code path did not enforce an allow-list of permitted column names or sort directions. Any string supplied by the client was appended to the ORDER BY clause verbatim.

Attack Vector

Exploitation requires network access to the Fineract API and valid credentials with permission to view clients. The attacker issues a GET request to /api/v1/clients and supplies a malicious orderBy parameter containing SQL syntax. By varying injected conditions across successive requests and observing response variations, the attacker extracts data character by character. On MySQL/MariaDB, calls to LOAD_FILE() inside the injected expression allow disclosure of configuration files, credentials, or private keys readable by the database user.

No public proof-of-concept exploit code is currently available. Refer to the Apache Mailing List Thread and the GitHub Pull Request for the technical fix details.

Detection Methods for CVE-2026-56287

Indicators of Compromise

Requests to /api/v1/clients where orderBy or sortOrder contain SQL keywords such as SELECT, UNION, SLEEP, CASE, WHEN, or LOAD_FILE
Unusually long or URL-encoded values in the orderBy query parameter
Repeated authenticated requests to the same endpoint with incremental variations in sorting parameters, consistent with blind extraction
Database error entries referencing malformed ORDER BY clauses originating from the Fineract application user

Detection Strategies

Deploy Web Application Firewall (WAF) rules that inspect orderBy and sortOrder parameters against an allow-list of known column names
Enable SQL query logging on the database and alert on queries containing LOAD_FILE() originating from the Fineract service account
Correlate authenticated user activity with abnormal request volumes to /api/v1/clients to identify enumeration behavior

Monitoring Recommendations

Aggregate Fineract application and database logs into a centralized analytics platform for cross-source correlation
Baseline normal API usage patterns per authenticated user and alert on statistically significant deviations
Monitor filesystem access events on database hosts for reads of sensitive files by the database process user

How to Mitigate CVE-2026-56287

Immediate Actions Required

Upgrade Apache Fineract to a fixed release that incorporates the patch referenced in Apache pull request #6020
Audit user accounts and revoke client-view permissions for any account that does not require them
Review database logs for prior exploitation attempts, specifically searching for injected ORDER BY fragments and LOAD_FILE() calls

Patch Information

The Apache Fineract project has released a fix through GitHub pull request #6020. Users must upgrade to a version containing this fix. The official announcement is available in the Apache Mailing List Thread and the Openwall OSS Security Post.

Workarounds

Place a reverse proxy or WAF in front of Fineract to enforce strict allow-list validation on orderBy and sortOrder parameters
Revoke the FILE privilege from the MySQL or MariaDB account used by Fineract to disable LOAD_FILE() functionality
Restrict filesystem permissions so the database process cannot read sensitive files such as /etc/passwd, application secrets, or private keys
Limit API access to trusted networks using IP allow-listing at the network perimeter

bash

# Revoke FILE privilege from the Fineract database user (MySQL/MariaDB)
REVOKE FILE ON *.* FROM 'fineract'@'%';
FLUSH PRIVILEGES;

# Verify the privilege has been removed
SHOW GRANTS FOR 'fineract'@'%';