CVE-2026-35544
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14.
Published Apr 3, 2026 · updated Jul 24, 2026 · roundcube webmail
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.
Code
The project this record applies to. Exploit listings stay in References.
Timeline
Detection, updates, and resolution for this record.
Apr 3, 2026 · NIST NVD
Detected
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.
Jul 24, 2026 · NIST NVD
Updated
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.
Affected
- cpe roundcube/webmailversion unspecified
Sources
- CVE.orgVulnerability recordCVE-2026-35544
Official CVE identifier
cve.org - NIST NVDVulnerability recordCVE-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.
nvd.nist.gov