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CVE-2026-75006 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:5.8 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/roundcube/roundcubemail/commit/7e10ca0110b7c9aa1b7850b843bb6625e47bbe00	[email protected]	Patch
https://github.com/roundcube/roundcubemail/commit/8a92380b06b5df1481e034c4f40d6a6546c21223	[email protected]	Patch
https://github.com/roundcube/roundcubemail/commit/92f85c883594e5be757154f94548a9ba903455c9	[email protected]	Patch
https://github.com/roundcube/roundcubemail/commit/c111b72950cd2bf57d6b86cd129568d90403322d	[email protected]	Patch
https://github.com/roundcube/roundcubemail/releases/tag/1.6.18	[email protected]	Release Notes
https://github.com/roundcube/roundcubemail/releases/tag/1.7.3	[email protected]	Release Notes
https://roundcube.net/news/2026/08/09/security-updates-1.6.18-and-1.7.3	[email protected]	Vendor Advisory

see all 7 references

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-918	Server-Side Request Forgery (SSRF)	[email protected]

Affected Products

Product	Versions
roundcube webmail	>= 1.6.0, < 1.6.18 >= 1.7.0, < 1.7.3
CPE cpe:2.3:a:roundcube:webmail:::::::: Remediation No remediation found in references.

Change History

3 change records found show changes

Date	Action	Recorded By
Sep 8, 2026	Initial Analysis	[email protected]
Aug 17, 2026	CVE Modified	CISA-ADP
Aug 17, 2026	New CVE Received	[email protected]