Vulnerability Description
Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has 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. The issue stems from an insufficient fix for CVE-2026-35540.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/roundcube/roundcubemail/commit/ab96c88bfd888866ec5e02190b1961
- https://github.com/roundcube/roundcubemail/commit/cb3fc9041e91640ba9ba49ee7b2147
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.16
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.1
- https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1
FAQ
What is CVE-2026-48843?
CVE-2026-48843 is a vulnerability with a CVSS score of 7.2 (HIGH). Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, ...
How severe is CVE-2026-48843?
CVE-2026-48843 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-48843?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.