{"id":"CVE-2021-38189","aliases":["GHSA-qc36-q22q-cjw3","RUSTSEC-2021-0069"],"url":"https://o3.security/vulnerability/CVE-2021-38189","summary":"SMTP command injection in lettre","details":"An issue was discovered in the lettre crate before 0.9.6 for Rust. In an e-mail message body, an attacker can place a . character after two <CR><LF> sequences and then inject arbitrary SMTP commands.","published":"2021-08-08T06:15:08.893Z","modified":"2026-08-07T11:31:16.058361116Z","cvss":{"score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":1,"affectedPackages":[{"ecosystem":"crates.io","name":"lettre","fixedVersion":"0.9.6"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/lettre/RUSTSEC-2021-0069.md"},{"type":"FIX","url":"https://rustsec.org/advisories/RUSTSEC-2021-0069.html"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:31:16.058361116Z"}}