CVE-2026-48843
Published:May 25, 2026
Updated:June 11, 2026
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.
Affected Packages
https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) >=v0.1-beta2 <1.6.16Fix Suggestion:
Update to version 1.6.16https://github.com/roundcube/roundcubemail.git (GITHUB):
Affected version(s) =1.7.0 <1.7.1Fix Suggestion:
Update to version 1.7.1roundcube/roundcubemail (PHP):
Affected version(s) =1.7.0 <1.7.1Fix Suggestion:
Update to version 1.7.1roundcube/roundcubemail (PHP):
Affected version(s) >=dev-release-1.7 <1.6.16Fix Suggestion:
Update to version 1.6.16Related Resources (5)
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
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
EPSS
Base Score:
0.04