Lettre vulnerabilities
We track 1 vulnerability in Lettre products. 1 is rated high or critical, and none are known to be exploited. The most recent was published on July 20, 2026.
1vulnerabilities
1critical
0high
0exploited
9.1average CVSS score
Latest Lettre vulnerabilities
- 9.1 Critical severity
lettre: Improper Certificate Validation
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