Vulnerability in Lettre

CVE-2026-46428

lettre is a a mailer library for Rust. Starting in version 0.10.1 and prior to version 0.11.22, an inverted-boolean bug in lettre's `boring-tls` integration silently disables TLS hostname verification for callers using the default (strict)…

Vulnerability class: Improper Certificate Validation

Affected products

  • Lettre — versions >= 0.10.1, < 0.11.22

Weakness classification (CWE)

References