CVE-2026-64631: SQL Injection Vulnerability Identified

CVE-2026-64631 Overview

CVE-2026-64631 is a SQL injection vulnerability [CWE-89] that allows a low-privileged authenticated user to inject SQL statements and extract database contents. The flaw stems from improper neutralization of user-supplied input in SQL query construction. An attacker with valid low-privilege credentials can issue crafted requests over the network to read data they are not authorized to access.

The issue is documented in a Veeam Knowledge Base Article. The vendor has not published affected version identifiers in the NVD record at the time of writing.

Critical Impact
Authenticated low-privileged attackers can exfiltrate sensitive database contents through SQL injection over the network.

Affected Products

Vendor-published details are available in the Veeam Knowledge Base Article
Specific affected products and versions are not enumerated in the NVD record
Refer to the vendor advisory for the authoritative product and version list

Discovery Timeline

2026-08-04 - CVE-2026-64631 published to the National Vulnerability Database (NVD)
2026-08-04 - Last updated in NVD database

Technical Details for CVE-2026-64631

Vulnerability Analysis

The vulnerability is a SQL injection [CWE-89] reachable by an authenticated user with low privileges. User-controlled input reaches a SQL query without adequate parameterization or sanitization. As a result, the attacker can alter the intended query structure and issue arbitrary read operations against the backing database.

The attack surface is network-reachable and requires no user interaction. Because the attacker already holds low-privileged credentials, exploitation bypasses controls that assume authenticated users are constrained by application-layer authorization. The confidentiality impact centers on unauthorized retrieval of database rows, including data belonging to other tenants, roles, or administrative scopes.

Root Cause

The root cause is improper neutralization of special elements used in a SQL command. The vulnerable code path concatenates or interpolates untrusted input into a query string rather than binding it as a parameter. Any input that includes SQL metacharacters is interpreted as part of the query grammar.

Attack Vector

An attacker authenticates with a low-privileged account and submits crafted values to a network-accessible endpoint that forwards those values into a SQL query. Typical payloads use UNION SELECT, boolean-based conditionals, or time-based inference to enumerate schema and extract row data. See the Veeam Knowledge Base Article for vendor-specific exploitation context.

No public proof-of-concept exploit is listed in the NVD record, and the vulnerability is not present in the CISA Known Exploited Vulnerabilities catalog. The EPSS probability is 0.266%.

Detection Methods for CVE-2026-64631

Indicators of Compromise

Application or database logs containing SQL metacharacters such as ', --, /*, UNION, or SLEEP( submitted by low-privileged accounts
Unusual SELECT volume or schema enumeration queries (information_schema, sys.tables) originating from application service accounts
Authenticated sessions issuing repeated malformed requests followed by successful responses containing unexpected data volumes

Detection Strategies

Enable database query logging and alert on syntactically anomalous statements executed under application service accounts
Deploy a web application firewall (WAF) with SQL injection signatures in blocking mode for the affected endpoints
Correlate authentication events with subsequent database read volume to identify low-privileged accounts pulling disproportionate data

Monitoring Recommendations

Baseline normal query patterns per role and alert on deviations, especially UNION-based or time-delayed queries
Monitor egress traffic from application servers for large or unusual data transfers following authenticated sessions
Review access logs for endpoints referenced in the Veeam Knowledge Base Article and flag repeated parameter tampering

How to Mitigate CVE-2026-64631

Immediate Actions Required

Apply the vendor-supplied fix documented in the Veeam Knowledge Base Article as soon as it is available in your environment
Audit low-privileged accounts, disable unused ones, and rotate credentials for accounts with access to the affected application
Restrict network reachability of the vulnerable interface to trusted management networks where feasible

Patch Information

Refer to the Veeam Knowledge Base Article for the authoritative list of fixed versions and upgrade instructions. Apply the vendor patch on all instances before re-exposing the service to broader networks.

Workarounds

Place a WAF in front of the application with SQL injection rules tuned for the affected endpoints until patching is complete
Enforce least privilege on the database account used by the application, removing rights to tables and schemas not required for normal operation
Enable verbose SQL and authentication logging to shorten detection time if exploitation is attempted

bash

# Example: restrict database account privileges to least required
REVOKE ALL PRIVILEGES ON *.* FROM 'app_user'@'%';
GRANT SELECT, INSERT, UPDATE ON app_db.app_table TO 'app_user'@'%';
FLUSH PRIVILEGES;