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CVE WatchJul 24, 2026

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 mess

CVSS

5.4

Medium

EPSS

0.4%

p32

KEV

—

Exploit Today

10

0-100

Published: Apr 3, 2026 · Last modified: Jul 24, 2026 · CWE-669

EPSS · 30d
0.3%EPSS · 30 days0.4%
2026-08-232026-09-21
Technical description

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.

Official references
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