{"action":"Upgrade event-listener to 5.4.2 or later.","affected":[{"fixed":"5.4.2","introduced":"5.1.0"}],"component":"event-listener","cve_ids":[],"ecosystem":"crates.io","exploited":false,"fixed_versions":["5.4.2"],"id":"tcs_01M5KFBWJDB6WN1SEYXMB7RXQW","modified_at":"2026-07-31T12:15:04.629484145Z","published_at":"2026-07-13T12:00:00Z","references":["https://osv.dev/vulnerability/RUSTSEC-2026-0221","https://crates.io/crates/event-listener","https://rustsec.org/advisories/RUSTSEC-2026-0221.html","https://github.com/smol-rs/event-listener/pull/163"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"RUSTSEC-2026-0221","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0221"}],"summary":"`event-listener` allows `!Send` tags to cross thread boundaries via `StackSlot`"}