U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-35544 Detail

Description

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

URL Source(s) Tag(s)
https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662 MITRE Patch 
https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0 MITRE Patch 
https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7 MITRE Patch 
https://github.com/roundcube/roundcubemail/releases/tag/1.5.14 MITRE Release Notes 
https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 MITRE Release Notes 
https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 MITRE Release Notes 
https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 MITRE Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-669 Incorrect Resource Transfer Between Spheres MITRE  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

5 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-35544
NVD Published Date:
04/03/2026
NVD Last Modified:
07/24/2026
Source:
MITRE