GHSA-2rp8-mm9q-fp49

### Summary `typeorm migration:generate` embeds database schema metadata into JS/TS template literals, escaping backticks but not `${...}`. An attacker who can write schema metadata (column comments, defaults, view definitions) achieves arbitrary code execution on the host that loads the generated migration. ### Details `MigrationGenerateCommand.ts` (L117-138) wraps each SQL statement in a JS template literal, escaping only backticks: ```typescript " await queryRunner.query(`" + upQuery.query.replaceAll("`", "\\`") + "`" + ... ``` Introspected schema strings reach this sink through driver query runners: | Driver | Metadata source | Source | |---|---|---| | Postgres | column `DEFAULT`, `COMMENT`, `CHECK` constraints, view definitions | [`PostgresQueryRunner.ts:1782`](https://github.com/typeorm/typeorm/blob/bf47c9f/src/driver/postgres/PostgresQueryRunner.ts#L1782), [`L1898`](https://github.com/typeorm/typeorm/blob/bf47c9f/src/driver/postgres/PostgresQueryRunner.ts#L1898), [`L2287`](https://github.com/typeorm/typeorm/blob/bf47c9f/src/driver/postgres/PostgresQueryRunner.ts#L2287), [`L4125`](https://github.com/typeorm/typeorm/blob/bf47c9f/src/driver/postgres/PostgresQueryRunner.ts#L4125) | | MySQL/MariaDB | `COLUMN_DEFAULT`, `COLUMN_COMMENT` | [`MysqlQueryRunner.ts:2873-2974`](https://github.com/typeorm/typeorm/blob/bf47c9f/src/driver/mysql/MysqlQueryRunner.ts#L2873-L2974), [`L3580-3583`](https://github.com/typeorm/typeorm/blob/bf47c9f/src/driver/mysql/MysqlQueryRunner.ts#L3580-L3583) | | CockroachDB | Same patterns as Postgres | [`CockroachQueryRunner.ts`](https://github.com/typeorm/typeorm/blob/bf47c9f/src/driver/cockroachdb/CockroachQueryRunner.ts) | `escapeComment()` on each driver strips only null bytes, leaving `${...}` intact: ```typescript protected escapeComment(comment?: string) { if (!comment) return comment comment = comment.replaceAll("\u0000", "") return comment } ``` When the migration file is loaded (`migration:run`, `i