RUSTSEC-2026-0135
Unsound transmute while debug/display printing batch Insert statements in Diesel's SQLite backend
- Severity
- Not rated yet
- No source has published a CVSS score yet
- Exploit chance (EPSS)
- —
- No score published
- Known exploited
- No
- Not in CISA's catalog
- Weakness
- —
- Not classified
- Fix
2.3.8- Upgrade diesel to this version or later
Description
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.
Affected versions
crates.io
| Package | Vulnerable | Fixed in |
|---|---|---|
| diesel | >= 0.0.0-0, < 2.3.8 |
2.3.8 |
How to fix
Move to the fixed version or later with your package manager, update the lockfile, and run your tests. If the package only arrives through another dependency, upgrade that dependency first. If none of its releases pulls a fixed version yet, force the version with your package manager's override.
diesel crates.io → 2.3.8
- cargo
cargo update -p diesel --precise 2.3.8
References
Advisories
Packages
Other links
Timeline
- Published
- Last updated by the source
Related advisories
| Advisory | Severity | Why it's related |
|---|---|---|
| GHSA-ggxf-9f6j-w742 Diesel has possible use after free when deserializing a SQLite database via `SqliteConnection::deserialize_readonly_database` | Medium | Also affects diesel |
| RUSTSEC-2026-0134 Unsound access to padding bytes while serializing date/time values using the Mysql backend | Not rated yet | Also affects diesel |
| GHSA-m9p2-fxp5-v3fp Diesel: Command injection in Diesel's implementation of `COPY FROM`/`COPY TO` | Medium | Also affects diesel |
| GHSA-q8x8-jrhj-fh9p Diesel: Possible unaligned data access for implementations of `SqliteAggregate` | Medium | Also affects diesel |
| GHSA-h5x4-m2qf-r4f2 Diesel's SQLite backend has possible UTF-8 corruption | High | Also affects diesel |
| GHSA-wq9x-qwcq-mmgf Diesel vulnerable to Binary Protocol Misinterpretation caused by Truncating or Overflowing Casts | High | Also affects diesel |
| RUSTSEC-2021-0037 Fix a use-after-free bug in diesels Sqlite backend | Critical | Also affects diesel |
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