CVE-2026-75006
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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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3
- https://github.com/roundcube/roundcubemail/commit/8a92380b06b5df1481e034c4f40d6a6546c21223
- https://github.com/roundcube/roundcubemail/commit/92f85c883594e5be757154f94548a9ba903455c9
- https://github.com/roundcube/roundcubemail/commit/7e10ca0110b7c9aa1b7850b843bb6625e47bbe00
- https://github.com/roundcube/roundcubemail/commit/c111b72950cd2bf57d6b86cd129568d90403322d
References (7)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- CHANGED
- Confidentiality
- NONE
- Integrity
- LOW
- Availability
- NONE
Quick Info
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