{"id":"CVE-2021-26911","details":"core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.","modified":"2026-04-11T13:54:02.911038Z","published":"2021-02-17T21:15:12.900Z","references":[{"type":"ADVISORY","url":"https://census-labs.com/news/category/advisories/"},{"type":"ADVISORY","url":"https://apps.apple.com/us/app/canary-mail/id1236045954"},{"type":"FIX","url":"https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018"},{"type":"FIX","url":"https://www.openwall.com/lists/oss-security/2021/02/17/3"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/02/17/3"},{"type":"EVIDENCE","url":"https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/canarymail/mailcore2","events":[{"introduced":"0"},{"fixed":"45acb4efbcaa57a20ac5127dc976538671fce018"}]},{"type":"GIT","repo":"https://github.com/mailcore/mailcore2","events":[{"introduced":"0"},{"last_affected":"5fb0f93010ff7af426e72e9066db8cb19b8154be"}],"database_specific":{"versions":[{"introduced":"0"},{"last_affected":"0.6.4"}]}}],"versions":["0.1","0.2","0.2.pre1","0.3.pre1","0.5","0.5.1","0.6","0.6.1","0.6.2","0.6.3","0.6.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26911.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"3.20"}]},{"events":[{"introduced":"0"},{"last_affected":"3.21"}]}],"vanir_signatures":[{"signature_type":"Function","id":"CVE-2021-26911-b6c26fdd","signature_version":"v1","source":"https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018","digest":{"function_hash":"58276512858806844581212893390254139380","length":2915},"deprecated":false,"target":{"function":"IMAPSession::connect","file":"src/core/imap/MCIMAPSession.cpp"}},{"signature_type":"Line","id":"CVE-2021-26911-ecff7eb9","signature_version":"v1","source":"https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018","digest":{"line_hashes":["183920586235143298930693814241404593940","295238391851967688791346911655989942881","188189554356135633814135185334812978196","329706182311884316420429833290968507427"],"threshold":0.9},"deprecated":false,"target":{"file":"src/core/imap/MCIMAPSession.cpp"}}],"vanir_signatures_modified":"2026-04-11T13:54:02Z"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}