{"id":"CVE-2021-26911","aliases":["EUVD-2021-13695","GHSA-hw2c-8pmg-px6w"],"status":"published","title":"core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for...","description":"core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.","severity":{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.01104,"percentile":0.66222,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-295"],"published":"2021-02-17T20:54:08Z","modified":"2026-10-24T14:18:03Z","products":[{"vendor":"canarymail","product":"canary_mail"},{"vendor":"libmailcore","product":"mailcore2"}],"references":[{"url":"https://apps.apple.com/us/app/canary-mail/id1236045954","tags":["x_refsource_MISC","x_transferred","Product","Third Party Advisory","advisory"]},{"url":"https://census-labs.com/news/category/advisories/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://www.openwall.com/lists/oss-security/2021/02/17/3","tags":["x_refsource_MISC","x_transferred","Mailing List","Patch","Third Party Advisory","fix"]},{"url":"https://census-labs.com/news/2021/02/17/canary-mail-app-missing-certificate-validation-check-on-imap-starttls/","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence"]},{"url":"https://github.com/canarymail/mailcore2/commit/45acb4efbcaa57a20ac5127dc976538671fce018","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"http://www.openwall.com/lists/oss-security/2021/02/17/3","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Patch","Third Party Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-26911"},{"url":"https://github.com/advisories/GHSA-hw2c-8pmg-px6w"}],"sources":{"cve":[{"id":"CVE-2021-26911","description":"core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.","status":"published","published":"2021-02-17T20:54:08Z","modified":"2024-08-03T20:33:41.331Z","updated_at":"2026-11-02T14:32:57.368269Z"}],"euvd":[{"id":"EUVD-2021-13695","description":"core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.","status":"published","published":"2021-02-17T20:54:08Z","modified":"2024-08-03T20:33:41Z","updated_at":"2026-11-03T03:24:50.84326Z"}],"ghsa":[{"id":"GHSA-hw2c-8pmg-px6w","title":"core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for...","description":"core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.","status":"published","published":"2022-05-24T17:42:34Z","modified":"2023-01-29T05:05:48Z","cwes":["CWE-295"],"updated_at":"2026-11-02T14:45:52.819939Z"}],"nvd":[{"id":"CVE-2021-26911","description":"core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.","status":"published","published":"2021-02-17T21:15:12.9Z","modified":"2026-06-17T03:43:59.27Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"},{"version":"2.0","score":5.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-295"],"updated_at":"2026-11-02T14:06:50.031227Z"}],"osv":[{"id":"CVE-2021-26911","description":"core/imap/MCIMAPSession.cpp in Canary Mail before 3.22 has Missing SSL Certificate Validation for IMAP in STARTTLS mode.","status":"published","published":"2021-02-17T21:15:12.9Z","modified":"2026-10-24T14:18:03.262289565Z","cvss":[{"version":"3.1","score":7.4,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:18.778776Z"}]}}