CVE-2026-74998

High

Open

TLP:CLEAR

NVD CVE.org

AI Analysis

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Description

In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS (Cascading Style Sheets) proxy were not validated, which may result in information disclosure or XSS (cross-site scripting) via MIME sniffing.

Details

CVSS Score: 7.2
CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Confidence: 90%
Published: Aug 17, 2026
Last Modified: Aug 17, 2026

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