MySQL client error 2062 appears when an application calls a deprecated or unsafe C API function and the client library blocks it for security.
MySQL Error 2062: CR_INSECURE_API_ERR is a client-side security error triggered when your code calls an insecure or deprecated MySQL C API function. Replace the flagged call with the safer alternative (shown in the error message) and recompile to resolve the issue.
Insecure API function call: '%s' Use instead: '%s' An insecure function call was detected. Modify the application to use the suggested alternative function instead.
MySQL Error 2062 is a client-side security exception raised by libmysql when an application invokes a C API function that is considered insecure. The library aborts the call and returns the error before any SQL reaches the server.
The full text usually appears as: Insecure API function call: '%s' Use instead: '%s'. The placeholders reveal the forbidden function and its recommended replacement, guiding developers toward safer coding practices.
Fixing the problem is critical.
Insecure API calls can expose credentials, allow buffer overflows, or bypass SSL checks, putting production data at risk.
Error 2062 fires when libmysql detects functions removed or marked unsafe after MySQL 8.0.33, such as mysql_ssl_set() or mysql_init() without argument sanitization.
Compiling against an updated client library without updating your source code will surface the error immediately at runtime.
Mixing client and server versions, static linking outdated headers, or using third-party connectors that wrap deprecated C APIs can also trigger the exception.
Locate the insecure function in your source, consult the error message for its safe counterpart, and replace it. Recompile and run tests to confirm the error is cleared.
If multiple calls exist, update all occurrences.
Where replacements are not one-to-one, follow MySQL’s security guidelines or migrate to a higher-level connector (ODBC, JDBC, or the official MySQL C Connector) that already implements safe patterns.
Legacy C apps upgraded to MySQL 8 often call mysql_close() without checking return codes. Updating to mysql_real_connect() with SSL options fixes the issue.
Embedded systems that statically link MariaDB’s old client may conflict with a host machine’s newer libmysql.
Align the versions or vendor the correct library.
Compile with -Wdeprecated and enable MySQL header warnings to catch risky functions during development. Automate static analysis in CI to flag deprecated APIs before merge.
Use modern connectors or Galaxy’s context-aware AI copilot to generate safe, parameterized code snippets. Galaxy surfaces deprecations in pull-request comments, preventing insecure calls from reaching production.
Client error 2055 (CR_SERVER_LOST_EXTENDED) indicates a dropped TCP connection.
Review network reliability and increase net_read_timeout.
Error 2054 (CR_AUTH_PLUGIN_NOT_LOADED) occurs when the client lacks the authentication plugin requested by the server. Install the correct plugin or configure --default-auth.
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The error originates in the MySQL client library (libmysql). No SQL reaches the server.
Yes, but it re-introduces security risks. Always update your source code instead of downgrading libraries.
No official flag exists. MySQL intentionally blocks insecure APIs to protect data. Modify your code instead.
Galaxy’s AI copilot flags deprecated C API calls in code reviews and suggests secure replacements automatically.
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