CVE-2026-35544

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. 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.

5.3 /10

CVSS v3 : MEDIUM

V3 Legend

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References
Link Resource
https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662 Patch
https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0 Patch
https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7 Patch
https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 Release Notes
https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 Vendor Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*
History

09 Apr 2026, 01:09

Type Values Removed Values Added
References () https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662 - () https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662 - Patch
References () https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0 - () https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0 - Patch
References () https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7 - () https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7 - Patch
References () https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 - () https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 - Release Notes
References () https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 - () https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 - Release Notes
References () https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 - () https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 - Release Notes
References () https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 - () https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 - Vendor Advisory
First Time Roundcube
Roundcube webmail
CPE cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*

03 Apr 2026, 05:16

Type Values Removed Values Added
New CVE
Information

Published : 2026-04-03 05:16

Updated : 2026-04-09 01:09

NVD link : CVE-2026-35544

Mitre link : CVE-2026-35544

CVE.ORG link : CVE-2026-35544

JSON object : View

Products Affected

roundcube

  • webmail
CWE
CWE-669

Incorrect Resource Transfer Between Spheres