CVE-2026-35544
CVSS Score
5.3
EPSS Score
0.0%
EPSS Percentile
0th
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to a fixed-position mitigation bypass via the use of !important.
| CWE | CWE-669 |
| 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:N/S:U/C:N/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
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/226811a1c974271dbedca72672923abaff8191c0 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 github.com: https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 github.com: https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7