{"id":"GHSA-q8x8-jrhj-fh9p","summary":"Diesel: Possible unaligned data access for implementations of `SqliteAggregate`","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't 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.","aliases":["RUSTSEC-2026-0137"],"modified":"2026-05-20T07:26:23.800095769Z","published":"2026-05-19T19:39:37Z","database_specific":{"github_reviewed_at":"2026-05-19T19:39:37Z","nvd_published_at":null,"cwe_ids":["CWE-188"],"severity":"MODERATE","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/diesel-rs/diesel/pull/5042"},{"type":"PACKAGE","url":"https://github.com/diesel-rs/diesel"},{"type":"WEB","url":"https://rustsec.org/advisories/RUSTSEC-2026-0137.html"}],"affected":[{"package":{"name":"diesel","ecosystem":"crates.io","purl":"pkg:cargo/diesel"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.3.8"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-q8x8-jrhj-fh9p/GHSA-q8x8-jrhj-fh9p.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N"}]}