{
  "affected": [
    {
      "database_specific": {
        "categories": [],
        "cvss": null,
        "informational": null
      },
      "ecosystem_specific": {
        "affected_functions": null,
        "affects": {
          "arch": [],
          "functions": [
            "diesel::sqlite::SqliteAggregate"
          ],
          "os": []
        }
      },
      "package": {
        "ecosystem": "crates.io",
        "name": "diesel",
        "purl": "pkg:cargo/diesel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.0.0-0"
            },
            {
              "fixed": "2.3.8"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "versions": []
    }
  ],
  "aliases": [],
  "database_specific": {
    "license": "CC0-1.0"
  },
  "details": "Diesel allows to register custom aggregate SQL functions for SQLite via the `SqliteAggregate` interface.\n\nTo store an instance of the custom aggregate processor Diesel relied on the `sqlite3_aggregate_context` function provided by sqlite. This function doesn\u0027t provide any guarantees about alignment of the returned allocation, which in turn can lead to problems if the type implementing requires a special alignment, e.g. via a custom `#[align(x)]` attribute on the type implementing this trait. This affects any user of `SqliteAggregate` that registers the custom aggregate function with an SQLite connection, while using a non-standard alignment on the type implementing this trait.\n\n## Mitigation\n\nThe preferred mitigation to the outlined problem is to update to a Diesel version 2.3.8 or newer, which includes fixes for the problem.\n\n## Resolution\n\nDiesel now allocates the corresponding memory on Rust side to get a correctly aligned allocation.",
  "id": "RUSTSEC-2026-0137",
  "modified": "2026-05-13T14:16:31Z",
  "published": "2026-04-24T12:00:00Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://crates.io/crates/diesel"
    },
    {
      "type": "ADVISORY",
      "url": "https://rustsec.org/advisories/RUSTSEC-2026-0137.html"
    },
    {
      "type": "WEB",
      "url": "https://github.com/diesel-rs/diesel/pull/5042"
    }
  ],
  "related": [],
  "severity": [],
  "summary": "Possible unaligned data access for implementations of `SqliteAggregate`"
}