Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Roundcube | Webmail | >= 1.6.0, < 1.6.18 |
Related Weaknesses (CWE)
References
- https://github.com/roundcube/roundcubemail/commit/7e10ca0110b7c9aa1b7850b843bb66Patch
- https://github.com/roundcube/roundcubemail/commit/8a92380b06b5df1481e034c4f40d6aPatch
- https://github.com/roundcube/roundcubemail/commit/92f85c883594e5be757154f94548a9Patch
- https://github.com/roundcube/roundcubemail/commit/c111b72950cd2bf57d6b86cd129568Patch
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.18Release Notes
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.3Release Notes
- https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3Vendor Advisory
FAQ
What is CVE-2026-75006?
CVE-2026-75006 is a vulnerability with a CVSS score of 5.8 (MEDIUM). 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 styleshee...
How severe is CVE-2026-75006?
CVE-2026-75006 has been rated MEDIUM with a CVSS base score of 5.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-75006?
Check the references section above for vendor advisories and patch information. Affected products include: Roundcube Webmail.