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Search Results (3 CVEs found)

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CVE Vendors Products Updated CVSS v3.1
CVE-2026-46428 1 Lettre 1 Lettre 2026-07-21 N/A
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.
CVE-2021-38189 1 Lettre 1 Lettre 2024-11-21 9.8 Critical
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.
CVE-2020-28247 1 Lettre 1 Lettre 2024-11-21 5.3 Medium
The lettre library through 0.10.0-alpha for Rust allows arbitrary sendmail option injection via transport/sendmail/mod.rs.