{"id":"CVE-2026-107121","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-107121","generatedAt":"2026-10-28T01:52:51.107Z","title":"When the STARTTLS option is enabled, Keycloak fails to strictly enforce an encrypted connection, allowing it to fall back to unencrypted communication if the encryption request is tampered with.","description":"A flaw was found in the SMTP email configuration handling of the keycloak-services component. When the STARTTLS option is enabled, Keycloak fails to strictly enforce an encrypted connection, allowing it to fall back to unencrypted communication if the encryption request is tampered with. An attacker who can intercept network traffic can exploit this to capture sensitive email credentials and message content in plain text.","published":"2026-10-07T08:16:57.000Z","lastModified":"2026-10-07T17:16:53.000Z","status":"Awaiting Analysis","sourceIdentifier":"secalert@redhat.com","cvss":{"version":"3.1","score":6.5,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N"},"cwe":["CWE-319"],"affected":[],"epss":{"score":0.00084,"percentile":0.00261,"date":"2026-10-26","history":[{"date":"2026-10-07","score":0.00084,"percentile":0.00245}]},"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 (0.08%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-10-07T08:16:57.000Z","detail":{"score":"6.5","severity":"MEDIUM","publishedAt":"2026-10-07T08:16:57.053Z"},"summary":"New CVE, medium severity (CVSS 6.5)."}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-107121","source":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2547296","source":"secalert@redhat.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-107121","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."}