crates.ioPackage

lettre

3 known vulnerabilities (1 critical), with the versions each affects and the releases that fix them.

Version timeline

CVE-2026-46428
Affects 0.10.1 to 0.11.21 (0.11.22 is outside it)
CVE-2021-38189
Affects 0.7.0 to 0.9.5 (0.9.6 is outside it); 0.10.0-alpha.1 to 0.10.0-rc.2 (0.10.0-rc.3 is outside it)
CVE-2020-28247
Affects 0.7.0 (0.7.1 is outside it); 0.8.0 to 0.8.3 (0.8.4 is outside it); 0.9.0 to 0.9.3 (0.9.5 is outside it); 0.10.0-alpha.1 to 0.10.0-alpha.3 (0.10.0-alpha.4 is outside it)

Every release cve.now has on record, lowest version on the left; each bar is a run of versions an advisory affects.

CVE-2026-46428Critical 9.1
lettre has TLS hostname verification disabled when using Boring TLS backend
Affected: from 0.10.1, fixed in 0.11.22.
Fixed in 0.11.22 (released May 14, 2026, 67 days before disclosure).
The latest release, 0.11.23, is not affected.
CVE-2021-38189Unrated
An issue was discovered in the lettre crate before 0.9.6 for Rust.
Affected: from 0.7.0, fixed in 0.9.6; from 0.10.0-alpha.1, fixed in 0.10.0-rc.3; from 0.7.0, fixed in 0.9.6.
Fixed in 0.9.6 (released May 22, 2021, 78 days before disclosure) and 0.10.0-rc.3 (released May 22, 2021, 78 days before disclosure).
The latest release, 0.11.23, is not affected.
CVE-2020-28247Unrated
The lettre library through 0.10.0-alpha for Rust allows arbitrary sendmail option injection via transport/sendmail/mod.rs.
Affected: from 0.9.0, fixed in 0.9.5; from 0.8.0, fixed in 0.8.4; from 0.7.0, fixed in 0.7.1; from 0.7.0, fixed in 0.7.1; from 0.8.0, fixed in 0.8.4; from 0.9.0, fixed in 0.9.5; from 0.10.0-alpha.1, fixed in 0.10.0-alpha.4.
Fixed in 0.7.1 (released Nov 11, 2020, 1 day before disclosure), 0.8.4 (released Nov 11, 2020, 1 day before disclosure), 0.9.5 (released Nov 11, 2020, 1 day before disclosure) and 1 other version.
The latest release, 0.11.23, is not affected.