{"id":"EUVD-2026-45982","revision":"f7c388626c3548a5b20013f33d8b602d","records":[{"revision":"f7c388626c3548a5b20013f33d8b602d","observedAt":"2026-11-07T10:37:41.572+00:00","statement":{"source":"euvd","id":"EUVD-2026-45982","aliases":["CVE-2026-46428","GHSA-4pj9-g833-qx53"],"title":"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) …","description":"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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N","score":9.1,"severity":null}],"references":["https://github.com/lettre/lettre/security/advisories/GHSA-4pj9-g833-qx53","https://github.com/lettre/lettre/commit/f5efffc88360dbdbfcef80f465e42d5bce68ca35","https://github.com/lettre/lettre/releases/tag/v0.11.22","https://rustsec.org/advisories/RUSTSEC-2026-0141.html"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-45982","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 20, 2026, 3:37:58 PM","dateUpdated":"Jul 21, 2026, 3:49:36 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-45982","identifiers":["EUVD-2026-45982","CVE-2026-46428","GHSA-4pj9-g833-qx53"]},"retained":false,"historicalAffected":[]}],"coverage":[]}