Is CVE-2026-62643 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-62643?

CVE-2026-62643 has a CVSS v3 severity of HIGH (7.2).

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CVE-2026-62643

Description

In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, 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. NOTE: this issue exists because of insufficient fixes for CVE-2026-35540 and CVE-2026-48843.