Medium 6.8Published Oct 21, 2026

CVE-2026-114732Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an improper authentication vulnerability in multi-host installations.

Updated under an hour ago (Oct 28, 2026, 4:40 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for Roundcube Webmail

Exploited in the last 30 days

Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an improper authentication vulnerability in multi-host installations. When a user logs in with an alias address, rcube_user::query() matched the address against identity records without qualifying the lookup by IMAP host, so a login could be resolved to a user account belonging to a different IMAP host. Upstream fixed this in the commit “Fix bug where an alias login wasn’t qualified by IMAP host”.

CVSS: 6.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-288
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: mitre
NVD analysis: Awaiting Analysis
Record last updated: Oct 21, 2026
First seen by InfoSec Signals: Oct 21, 2026

Affected products

Affected products

Roundcube Webmail roundcube:webmail (from the name)	from 1.6.0 before 1.6.20; from 1.7.0 before 1.7.5	CNA record

References

References

https://bugs.debian.org/1151279	issue-tracking, third-party-advisory
https://github.com/roundcube/roundcubemail/commit/453c413d6851cf603bebdb15e58381f5ef9b8094	patch
https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5	vendor-advisory, release-notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7.5	release-notes, patch
https://github.com/roundcube/roundcubemail/releases/tag/1.6.20	release-notes, patch
https://github.com/roundcube/roundcubemail/commit/cb235cbfef88cbf78236dc67d3b667bf3dc61ddd	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.