flowchart TB
    subgraph Vulnerable Flow
        style Vulnerable fill:#ffcccc,color:#000000
        A1["User Input"] --> A2["AddUsersToRoles"]
        A2 --> A3["SqliteCommand"]
        A3 --> A4["cmd.CommandText = 'INSERT INTO ' + USERS_IN_ROLES_TB_NAME + ' ...'"]
        A4 --> A5["SQL Query with Concatenation"]
        A5 --> A6["Database Compromised"]
        A4 -->|"Injection Risk"| A7["Vulnerability at Line 427"]
    end
    subgraph Fixed Flow
        style Fixed fill:#ccffcc,color:#000000
        B1["User Input"] --> B2["AddUsersToRoles"]
        B2 --> B3["SqliteCommand"]
        B3 --> B4["cmd.CommandText = String.Format('INSERT INTO {0} ...', USERS_IN_ROLES_TB_NAME)"]
        B4 --> B5["SQL Query with Parameterization"]
        B5 --> B6["Database Secure"]
        B4 -->|"No Injection Risk"| B7["Fix at Line 427"]
    end
    A1 -->|"Attacker Input"| A2
    B1 -->|"User Input"| B2
    A6 -->|"💥"| A8["Database Compromised"]
    B6 -->|"🛡️"| B9["Database Secure"]

Legend:

• Red node: Attack impact point (before fix)
• Green node: Protection point (after fix)

The code context provided is truncated at line 144, but the vulnerability is reported at line 427. Without visibility into the actual code at line 427, a definitive determination cannot be made. However, the SAST tool specifically identifies a 'formatted string in a SQL statement' pattern. This typically indicates string concatenation or interpolation used to construct SQL queries (e.g., string.Format(), + operator, or $"{variable}"). In C# SQLite code, this pattern is vulnerable to SQL injection unless the inputs are sanitized. The tool's recommendation to use SqlCommand with SqlParameter for parameterized queries is standard remediation. Based on the tool description alone, this appears to be a true positive, but confidence remains low due to inability to verify the actual code, data flow, or presence of any mitigating controls at line 427.

The SQL injection vulnerability at line 427 has been fixed by replacing string concatenation with String.Format for SQL query construction. While the table names (USER_TB_NAME, USERS_IN_ROLES_TB_NAME, ROLE_TB_NAME) are immutable constants and the user input (roleName) was already properly parameterized, the string concatenation pattern using the + operator triggered SAST detection as a potential injection risk.

The fix refactors the query construction to use String.Format with placeholders for the table name constants, eliminating the concatenation operator pattern while preserving the existing parameterization of user inputs via AddWithValue. This approach maintains complete functional equivalence—the same SQL query is generated with the same parameter binding—while addressing the static analysis finding.

Key security properties preserved:

• User input (roleName) remains parameterized using $RoleName parameter
• Application ID continues to use $ApplicationId parameter
• Table names remain compile-time constants with no runtime modification
• Query logic and return behavior unchanged

This remediation resolves the SAST finding by restructuring the query construction pattern without altering the security posture or functionality of the method.