{"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":"2026-07-09T01:30:58.668156Z","published":"2021-02-17T21:15:12.900Z","database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:a:canarymail:canary_mail:3.20:*:*:*:*:iphone_os:*:*","cpe:2.3:a:canarymail:canary_mail:3.21:*:*:*:*:iphone_os:*:*"],"extracted_events":[{"introduced":"3.20"},{"last_affected":"3.20"},{"introduced":"3.21"},{"last_affected":"3.21"}],"source":"CPE_STRING","vendor_product":"canarymail:canary_mail"}]},"references":[{"type":"ADVISORY","url":"https://apps.apple.com/us/app/canary-mail/id1236045954"},{"type":"ADVISORY","url":"https://census-labs.com/news/category/advisories/"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/02/17/3"},{"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":"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"}],"database_specific":{"source":"REFERENCES"}}],"versions":["0.6.2","0.6.1","0.6","0.5.1","0.5","0.3.pre1","0.2","0.2.pre1","0.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26911.json","vanir_signatures_modified":"2026-07-09T01:30:58Z","vanir_signatures":[{"deprecated":false,"digest":{"function_hash":"58276512858806844581212893390254139380","length":2915},"id":"CVE-2021-26911-b6c26fdd","signature_type":"Function","signature_version":"v1","source":"https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018","target":{"file":"src/core/imap/MCIMAPSession.cpp","function":"IMAPSession::connect"}},{"target":{"file":"src/core/imap/MCIMAPSession.cpp"},"deprecated":false,"digest":{"line_hashes":["183920586235143298930693814241404593940","295238391851967688791346911655989942881","188189554356135633814135185334812978196","329706182311884316420429833290968507427"],"threshold":0.9},"id":"CVE-2021-26911-ecff7eb9","signature_type":"Line","signature_version":"v1","source":"https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018"}]}},{"ranges":[{"type":"GIT","repo":"https://github.com/mailcore/mailcore2","events":[{"introduced":"5fb0f93010ff7af426e72e9066db8cb19b8154be"},{"last_affected":"5fb0f93010ff7af426e72e9066db8cb19b8154be"}],"database_specific":{"cpe":"cpe:2.3:a:libmailcore:mailcore2:0.6.4:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0.6.4"},{"last_affected":"0.6.4"}],"source":"CPE_STRING"}}],"versions":["0.6.4"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-26911.json"}}],"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"}]}