Medium severity · published Oct 22, 2026
CVE-2026-114732
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
New
6.8
CVSS
0.4%
EPSS
No
On KEV
Description
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 vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 29% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
Webmail · Roundcube
1.6.0 before 1.6.20; 1.7.0 before 1.7.5 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-114732
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-114732
bugs.debian.org
https://bugs.debian.org/1151279
github.com
https://github.com/roundcube/roundcubemail/commit/453c413d6851cf603bebdb15e58381f5ef9b8094
github.com
https://github.com/roundcube/roundcubemail/commit/cb235cbfef88cbf78236dc67d3b667bf3dc61ddd
github.com
https://github.com/roundcube/roundcubemail/releases/tag/1.6.20
github.com
https://github.com/roundcube/roundcubemail/releases/tag/1.7.5
roundcube.net
https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5
More from Webmail
9.8
CVE-2021-44026
Roundcube Webmail SQL Injection Vulnerability
9.8
CVE-2020-12641
Roundcube Webmail Remote Code Execution Vulnerability
9.3
CVE-2024-42009
RoundCube Webmail Cross-Site Scripting Vulnerability
8.8
CVE-2025-49113
RoundCube Webmail Deserialization of Untrusted Data Vulnerability
7.8
CVE-2017-16651
Roundcube Webmail File Disclosure Vulnerability