CVE-2026-35540

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...

CVE-2026-35540

Summary: CVE-2026-35540 affects Roundcube Webmail 1.6.0 through before 1.6.14. The issue is insufficient CSS sanitization in HTML e‑mail messages, which may allow SSRF or Information Disclosure when stylesheet links resolve to local network hosts. What’s affected: Roundcube Webmail (version linea...

October CMS Vulnerable to Stored XSS via Editor and Branding Styles

A cross-site scripting XSS vulnerabilities was identified in October CMS backend configuration forms: - Editor Settings Markup Styles A user with the Global Editor Settings permission could inject malicious HTML/JS into the stylesheet input at Settings → Editor Settings → Markup Styles. A special...