{"id":"CVE-2026-113866","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-113866","generatedAt":"2026-10-28T06:35:54.394Z","title":"Due to a bug, that unencrypted request included the credentials the user had entered, allowing a network attacker to obtain the user's password.","description":"When setting up an account, Thunderbird's Exchange AutoDiscover lookup also queried the domain's AutoDiscover service over plain HTTP. Due to a bug, that unencrypted request included the credentials the user had entered, allowing a network attacker to obtain the user's password. This vulnerability was fixed in Thunderbird 158.0.1 and Thunderbird 153.5.1.","published":"2026-10-20T20:17:19.000Z","lastModified":"2026-10-22T17:36:47.000Z","status":"Awaiting Analysis","sourceIdentifier":"security@mozilla.org","cvss":{"version":"3.1","score":5.9,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-523"],"affected":[],"epss":{"score":0.00365,"percentile":0.30136,"date":"2026-10-27","history":[{"date":"2026-10-21","score":0.00365,"percentile":0.29076}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.36%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-20T20:17:19.000Z","detail":{"score":"5.9","severity":"MEDIUM","publishedAt":"2026-10-20T20:17:19.397Z"},"summary":"New CVE, medium severity (CVSS 5.9)."}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2080121","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-114/","source":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-115/","source":"security@mozilla.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-113866","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}