What is CVE-2026-75006?

CVE-2026-75006 is a medium-severity vulnerability in Roundcube Webmail, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-08-17.

How severe is CVE-2026-75006?

Medium severity. CVSS v3 base score is 5.8 out of 10.

SSRF in Roundcube Webmail

CVE-2026-75006

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.

Vulnerability class: SSRF (Server-Side Request Forgery)

CVSS v3 metric

CVSS v3 base score 5.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N.

Affected products

Roundcube Webmail — versions 1.6.0, 1.7.0

Weakness classification (CWE)

CWE-918 — Server-Side Request Forgery (SSRF)

References

Frequently asked questions

What is CVE-2026-75006?: CVE-2026-75006 is a medium-severity vulnerability in Roundcube Webmail, classified under Server-Side Request Forgery (SSRF). CVSS score: 5.8/10. Published 2026-08-17.
How severe is CVE-2026-75006?: Medium severity. CVSS v3 base score is 5.8 out of 10.