CVE-2026-35540
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14. 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.
| CWE | CWE-669 |
| Vendor | roundcube |
| Product | webmail |
| Published | Apr 3, 2026 |
| Last Updated | Apr 3, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
Roundcube / Webmail
1.6.0 < 1.6.14
References
roundcube.net: https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5 github.com: https://github.com/roundcube/roundcubemail/commit/579b68eff90650a5c782e153debd66c765648942 github.com: https://github.com/roundcube/roundcubemail/releases/tag/1.6.14 github.com: https://github.com/roundcube/roundcubemail/commit/27ec6cc9cb25e1ef8b4d4ef39ce76d619caa6870