RUSTSEC-2026-0138

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Source

https://rustsec.org/advisories/RUSTSEC-2026-0138

Import Source

https://github.com/rustsec/advisory-db/blob/osv/crates/RUSTSEC-2026-0138.json

JSON Data

https://api.osv.dev/v1/vulns/RUSTSEC-2026-0138

Published

2026-04-30T12:00:00Z

Modified

2026-05-13T14:32:26.464180Z

Summary

Unsound access to padding bytes while serializing date/time values using the Mysql backend

Details

Diesel-async uses the mysql-async crate for interacting with Mysql compatible databases. This library already provides access to deserialized data for date/time releated types. Diesel-async then translated these deserialized data back to their serialized binary representation to hook into diesels desearialization framework.

While serializing these data/time values again Diesel-async relied on a cast between the MysqlTime #[repr(C)] struct (defined by Diesel) and a byte array. As this cast exposes padding bytes contained in this struct, this is undefined behaviour.

This vulnerability affects any user deserializing date/time values using the Mysql backend and diesel-async.

This affects any usage of the following functions with a AsyncMysqlConnection provided by diesel-async:

diesel::serialize::FromSql<Timestamp, Mysql>
diesel::serialize::FromSql<Time, Mysql>
diesel::serialize::FromSql<Date, Mysql>
diesel::serialize::FromSql<DateTime, Mysql>

Mitigation

The preferred mitigation to the outlined problem is to update to Diesel-async version 0.9.0 or newer, which includes fixes for the problem.

Resolution

Diesel-async now just calls a safe serialization method provided by Diesel 2.3.9 and newer

Database specific

{
    "license": "CC0-1.0"
}

References

Affected packages

crates.io / diesel-async

Package

Name: diesel-async; View open source insights on deps.dev
Purl: pkg:cargo/diesel-async

Affected ranges

Type: SEMVER
Events: Introduced

0.0.0-0

Fixed

0.9.0

Ecosystem specific

{
    "affected_functions": null,
    "affects": {
        "os": [],
        "arch": [],
        "functions": []
    }
}