{"action":"Upgrade smallvec to 0.3.4 or later.","affected":[{"fixed":"0.3.4","introduced":"0.3.2"},{"fixed":"0.4.5","introduced":"0.4.0-0"},{"fixed":"0.5.1","introduced":"0.5.0-0"},{"fixed":"0.6.3","introduced":"0.6.0-0"}],"component":"smallvec","cve_ids":["CVE-2018-20991"],"ecosystem":"crates.io","epss":0.01848,"exploited":false,"fixed_versions":["0.3.4","0.4.5","0.5.1","0.6.3"],"ghsa_id":"GHSA-rxr4-x558-x7hw","id":"tcs_01M5KF54SJ8SX6BE10KV879V33","modified_at":"2026-07-17T16:00:03.239783240Z","published_at":"2018-07-19T12:00:00Z","references":["https://osv.dev/vulnerability/RUSTSEC-2018-0003","https://crates.io/crates/smallvec","https://rustsec.org/advisories/RUSTSEC-2018-0003.html","https://github.com/servo/rust-smallvec/issues/96"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"RUSTSEC-2018-0003","url":"https://osv.dev/vulnerability/RUSTSEC-2018-0003"}],"summary":"Possible double free during unwinding in SmallVec::insert_many"}