Moole Vulnerability Database

Find real vulnerabilities before they ship

Medium

CVE-2026-35544

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.

VectorNETWORK

PublishedApr 03, 2026, 05:16

Published Bycve@mitre.org

Base Score

Score5.3

Affected Versions

Package (Ecosystem)IntroducedFixedLimit

roundcube/roundcubemail(Packagist)1.7-beta1.7-rc5N/A

References

https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662
https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0
https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7
https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14

Weakness Type

CWE-669

CVSS Metrics

Base Score

5.3

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Base SeverityMedium

Version

3.1

Attack Vector (AV)

NETWORK