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Medium 5.3Published Apr 3, 2026
CVE-2026-35544An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14.
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 5.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
- Weakness (CWE)
- CWE-669
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 24, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
roundcube webmail roundcube:webmail | through 1.5.13; from 1.6.0 through 1.6.13 | NVD |
References
- https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662patch
- https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0patch
- https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7patch
- https://github.com/roundcube/roundcubemail/releases/tag/1.5.14release-notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.14release-notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5release-notes
- https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.