Medium severity5.3NVD Advisory· Published Apr 3, 2026· Updated Apr 9, 2026
CVE-2026-35544
CVE-2026-35544
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
roundcube/roundcubemailPackagist | >= 1.7-beta, < 1.7-rc5 | 1.7-rc5 |
Affected products
2Patches
Vulnerability mechanics
References
9- github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662nvdPatchWEB
- github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0nvdPatchWEB
- github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7nvdPatchWEB
- github.com/advisories/GHSA-xpqh-grpw-4xmgghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-35544ghsaADVISORY
- roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14nvdVendor AdvisoryWEB
- github.com/roundcube/roundcubemail/releases/tag/1.5.14nvdRelease NotesWEB
- github.com/roundcube/roundcubemail/releases/tag/1.6.14nvdRelease NotesWEB
- github.com/roundcube/roundcubemail/releases/tag/1.7-rc5nvdRelease NotesWEB
News mentions
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