CVE-2026-75006
Published:August 17, 2026
Updated:September 01, 2026
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 Packages
https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) >=1.6.0 <1.6.18Fix Suggestion:
Update to version 1.6.18https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) >=1.7.0 <1.7.3Fix Suggestion:
Update to version 1.7.3roundcube/roundcubemail (PHP):
Affected version(s) >=1.7.0 <1.7.3Fix Suggestion:
Update to version 1.7.3Related Resources (9)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
5.8
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
EPSS
Base Score:
0.42