CVE-2026-35540CWE-669

An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14

Medium · published April 3, 2026

CVSS v3.1
5.4
EPSS
0%
Percentile
31.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.4 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00386 · 31.5th percentile
Weakness
CWE-669 · Incorrect Resource Transfer Between Spheres
Published
2026-04-03T03:47Z
EPSS history
Timeline
  • 03 APR 03:47Z
    An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14
    cvelistv5