CVE-2026-35539
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insufficient HTML attachment sanitization in preview mode. A victim must preview a text/html attachment.
| CWE | CWE-79 |
| Vendor | roundcube |
| Product | webmail |
| Published | Apr 3, 2026 |
| Last Updated | Apr 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Roundcube / Webmail
0 < 1.5.14 1.6.0 < 1.6.14
References
roundcube.net: https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 github.com: https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 github.com: https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 github.com: https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab