# Risk map — diesel-rs/diesel

> Canonical page: https://codevetter.com/unpack/diesel/risk-map

# Risk map — diesel-rs/diesel

Scanned commit 5cdf54e1434b87084a4630c100249f1028f3e32d (2026-10-02). Generated by codevetter codevetter 1.15.0 on 2026-10-02.

Source inspection; upstream code and tests were not executed.

These findings describe source-level trust boundaries and review hotspots, not runtime-confirmed vulnerabilities. Database operations can mutate remote databases or local files, and raw SQL reduces compile-time validation. Migration commits and schema-file verification occur at different stages. The advanced blog example contains security-relevant teaching shortcuts and an update target that warrants focused review.
- Source observation: EditComment loads a comment scoped to the current user, but executes diesel::update(comments) without a filter or identified-record target; the update construction does not preserve the preceding ownership selection. — [examples/postgres/advanced-blog-cli/src/main.rs#L116-L128](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/examples/postgres/advanced-blog-cli/src/main.rs#L116-L128)
- Source observation: blog registration hashes passwords with Argon2 using a constant salt; the implementation explicitly warns against this pattern in real applications. — [examples/postgres/advanced-blog-cli/src/auth.rs#L10-L10](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/examples/postgres/advanced-blog-cli/src/auth.rs#L10-L10) [examples/postgres/advanced-blog-cli/src/auth.rs#L80-L99](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/examples/postgres/advanced-blog-cli/src/auth.rs#L80-L99)
- Operational boundary: database reset calls drop before setup; server backends execute DROP DATABASE, while SQLite drop removes an existing path supplied as database_url. — [diesel_cli/src/database.rs#L257-L264](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_cli/src/database.rs#L257-L264) [diesel_cli/src/database.rs#L410-L440](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_cli/src/database.rs#L410-L440) [diesel_cli/src/database.rs#L443-L474](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_cli/src/database.rs#L443-L474)
- Source observation: --locked-schema validation runs after migrations; a schema mismatch returns SchemaWouldChange, and the inspected dispatch provides no enclosing rollback around migration execution and file comparison. — [diesel_cli/src/migrations/mod.rs#L207-L214](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_cli/src/migrations/mod.rs#L207-L214) [diesel_cli/src/main.rs#L308-L325](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_cli/src/main.rs#L308-L325) [diesel_migrations/src/migration_harness.rs#L191-L201](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_migrations/src/migration_harness.rs#L191-L201)
- Migration metadata read/parse errors are discarded by unwrap_or_default; transaction-disabled migrations execute SQL and insert bookkeeping without the harness transaction wrapper. — [diesel_migrations/src/file_based_migrations.rs#L176-L185](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_migrations/src/file_based_migrations.rs#L176-L185) [diesel_migrations/migrations_internals/src/lib.rs#L36-L54](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_migrations/migrations_internals/src/lib.rs#L36-L54) [diesel_migrations/src/migration_harness.rs#L178-L195](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_migrations/src/migration_harness.rs#L178-L195)
- Raw SqlQuery binds cannot validate SQL placeholder types or parameter counts, and dynamic schemas cannot verify runtime table/column existence or declared types; these are documented reductions in static guarantees. — [diesel/src/query_builder/sql_query.rs#L34-L46](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel/src/query_builder/sql_query.rs#L34-L46) [diesel_dynamic_schema/src/lib.rs#L13-L27](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_dynamic_schema/src/lib.rs#L13-L27)
- Native PostgreSQL execution crosses unsafe libpq boundaries for connection pointers and parameter arrays; Statement::execute includes explicit i32 conversion checks, so preserving ownership and bounds behavior is essential when editing this code. — [diesel/src/pg/connection/raw.rs#L19-L46](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel/src/pg/connection/raw.rs#L19-L46) [diesel/src/pg/connection/stmt/mod.rs#L26-L89](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel/src/pg/connection/stmt/mod.rs#L26-L89)
- External trust boundaries include PATH-resolved rustfmt, VISUAL/EDITOR-selected subprocesses, temporary editor files, and configured schema/patch paths; relative paths are joined to the config directory without a repository-containment check in the inspected code. — [diesel_cli/src/print_schema.rs#L899-L923](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_cli/src/print_schema.rs#L899-L923) [examples/postgres/advanced-blog-cli/src/editor.rs#L8-L35](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/examples/postgres/advanced-blog-cli/src/editor.rs#L8-L35) [diesel_cli/src/config.rs#L546-L556](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_cli/src/config.rs#L546-L556) [diesel_cli/src/main.rs#L294-L325](https://github.com/diesel-rs/diesel/blob/5cdf54e1434b87084a4630c100249f1028f3e32d/diesel_cli/src/main.rs#L294-L325)

Every claim links to its cited files at the pinned commit. Citations identify source evidence; they do not establish runtime correctness. Independent CodeVetter scan — not reviewed by upstream maintainers.

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