CVE Watch20 jul 2026

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-

CVSS

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Sin CVSS

EPSS

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KEV

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Exploit Today

0-100

Publicado: 20 jul 2026 · Última mod.: 20 jul 2026 · CWE-295

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

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) configuration. An on-path attacker presenting any chain-valid certificate for any domain can intercept SMTP submission, including PLAIN/LOGIN credentials and message contents, against any lettre user built with the `boring-tls` feature. Other TLS backends (`native-tls`, `rustls`) are unaffected. Version 0.11.22 patches the issue.

Referencias oficiales

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