PT-2026-43106 · Roundcube · Webmail

Published 2026-05-25 · Updated 2026-05-25 · CVE-2026-48843

Mitre

CVSS v3.1

7.2

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has 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 issue stems from an insufficient fix for CVE-2026-35540.

Fix

SSRF

Weakness Enumeration

CWE-918

Related Identifiers

CVE-2026-48843

Affected Products

Webmail

References · 5

• https://github.com/roundcube/roundcubemail/releases/tag/1.7.1 · Note
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.16 · Note
• https://github.com/roundcube/roundcubemail/commit/cb3fc9041e91640ba9ba49ee7b2147c176ebf5a1 · Note
• https://github.com/roundcube/roundcubemail/commit/ab96c88bfd888866ec5e02190b19618db283923a · Note
• https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1 · Note