PT-2026-29979

CVE-2026-35540

Published

2026-03-18

Updated

2026-08-17

Description by

CVSS 3.1

6.5

Medium

MetricsAV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions Roundcube Webmail versions 1.6.0 through 1.6.13

Description An issue exists in Roundcube Webmail where insufficient Cascading Style Sheets (CSS) sanitization in HTML email messages could lead to Server-Side Request Forgery (SSRF) or Information Disclosure. This can occur if stylesheet links point to local network hosts.

Recommendations Update Roundcube Webmail to version 1.6.14 or later.

Exploitability

Exploit

Fix

Impacts

Researchers

Vendors

Affected products

Weakness enumeration

CWE-669: Incorrect Resource Transfer Between Spheres

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

Related identifiers