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{"bugzilla": {"description": "roundcubemail: roundcubemail: Unauthorized account access via alias login in multi-host environments", "id": "2558748", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2558748"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N", "status": "draft"}, "cwe": "CWE-303", "details": ["A flaw was found in Roundcube Webmail. In multi-host installations, user authentication using an alias address does not restrict account lookup to the specific Internet Message Access Protocol (IMAP) host. A remote authenticated user could exploit this flaw to gain unauthorized access to another user's account hosted on a different mail server."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability."}, "name": "CVE-2026-114732", "public_date": "2026-10-22T02:16:51Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-114732\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-114732\nhttps://bugs.debian.org/1151279\nhttps://github.com/roundcube/roundcubemail/commit/453c413d6851cf603bebdb15e58381f5ef9b8094\nhttps://github.com/roundcube/roundcubemail/commit/cb235cbfef88cbf78236dc67d3b667bf3dc61ddd\nhttps://github.com/roundcube/roundcubemail/releases/tag/1.6.20\nhttps://github.com/roundcube/roundcubemail/releases/tag/1.7.5\nhttps://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5"], "statement": "This vulnerability is rated as Moderate severity rather than Important because exploitation depends on a non-default multi-host IMAP configuration where overlapping alias identities exist across different backend servers. Roundcube Webmail is not included in core Red Hat Enterprise Linux distributions and is only distributed through community repositories such as EPEL. Single-host mail server architectures and configurations that authenticate users strictly against their canonical mailbox usernames are unaffected by this issue.", "threat_severity": "Moderate"}