Description
In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. This issue exists because of insufficient fixes for CVE-2026-35540, CVE-2026-48843 and CVE-2026-62643.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Roundcube Webmail
Default version status: unaffected
1.6.0 to < 1.6.18affected1.7.0 to < 1.7.3affected
References
- https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3 ↗
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.18 ↗
- https://github.com/roundcube/roundcubemail/commit/8a92380b06b5df1481e034c4f40d6a6546c21223 ↗
- https://github.com/roundcube/roundcubemail/commit/92f85c883594e5be757154f94548a9ba903455c9 ↗
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.3 ↗
- https://github.com/roundcube/roundcubemail/commit/7e10ca0110b7c9aa1b7850b843bb6625e47bbe00 ↗
- https://github.com/roundcube/roundcubemail/commit/c111b72950cd2bf57d6b86cd129568d90403322d ↗