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.
- Affected products
- Red Os, Roundcube Webmail
- Roundcube Webmail
- < 1.6.14
- Fix
- Available
- CVSS 3.1
- 6.5 MEDIUM
- EPSS
- 0.3% (23th percentile)
- Weakness
- CWE-669
- NVD status
- Analyzed
- Published
- 2026-04-03
CVE-2026-35540 at NVD
No indexed exploits for CVE-2026-35540 yet
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No exploit for CVE-2026-35540 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.