RUSTSEC-2026-0135
Unsound transmute while debug/display printing batch Insert statements in Diesel's SQLite backend
Diesel allows users to output the generated SQL for any query DSL construct via th diesel::debug_query function as Display and Debug output.
For the particular implementation used by batch Insert statements in the SQLite backend Diesel relied on an unspecified transmute between types with a #[repr(rust)] layout. This is formally undefined behaviour as the compiler is free to change the layout of these types at any time.
This vulnerability affects users that print out batch insert statements constructed using an array/vector of values without default values using diesel::debug_query on the SQLite backend.
Mitigation
The preferred mitigation to the outlined problem is to update to Diesel version 2.3.8 or newer, which includes fixes for the problem.
Resolution
Diesel now uses a sound cast instead.
What each source reports
OSV No score
Unsound transmute while debug/display printing batch Insert statements in Diesel's SQLite backend
Diesel allows users to output the generated SQL for any query DSL construct via th diesel::debug_query function as Display and Debug output.
For the particular implementation used by batch Insert statements in the SQLite backend Diesel relied on an unspecified transmute between types with a #[repr(rust)] layout. This is formally undefined behaviour as the compiler is free to change the layout of these types at any time.
This vulnerability affects users that print out batch insert statements constructed using an array/vector of values without default values using diesel::debug_query on the SQLite backend.
Mitigation
The preferred mitigation to the outlined problem is to update to Diesel version 2.3.8 or newer, which includes fixes for the problem.
Resolution
Diesel now uses a sound cast instead.
- Record
RUSTSEC-2026-0135- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
dieselcrates.io |
0.0.0-0 up to 2.3.8 | 2.3.8 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
RUSTSEC-2026-0135 is a vulnerability with no CVSS score yet in diesel, published April 24, 2026. No source lists public exploit code. Fixed in diesel 2.3.8.