PDO\Sqlite::loadExtension loads arbitrary shared objects

Description

Unlike SQLite3::loadExtension, Pdo\Sqlite::loadExtension does not check sqlite3.extension_dir and calls sqlite3_load_extension with the absolute path to the extension parameter. This allows executing native code from PHP code subject to open_basedir / disable_functions (which are not security boundaries anyway).

https://github.com/php/php-src/blob/769441ba430995733d2ad21727d51b1ace115317/ext/pdo_sqlite/pdo_sqlite.c#L102-L113

I'll open a PR with my patch later this week. It introduces a similar check to SQLite3::loadExtension and restricts extension loading to a trusted directory (sqlite3.extension_dir) set in advance.

PHP Version

PHP 8.6.0-dev (cli) (built: May 10 2026 23:58:07) (NTS)
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Operating System

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