CVE-2020-28247: Lettre

Medium severity, CVSS 5.3. EPSS: 1.5% chance of exploitation in the next 30 days.

The lettre library through 0.10.0-alpha for Rust allows arbitrary sendmail option injection via transport/sendmail/mod.rs.

Affected products

• Lettre Lettre: from 0.8.0, up to and including 0.8.3; from 0.9.0, up to and including 0.9.5; version 0.7.0 only; version 0.10.0 only

Published 2020-11-12. Last modified 2026-06-17.