Name: CVE-2026-74998: Improper Neutralization of Input During Web Page Generation
Creator: Rapid7
Published: 2026-08-17T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-74998, CWE-79, CVSS 7.2, EPSS 0.00438

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.

CVSS Details

CVSS 3.1 Base Score: 7.2
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Debian	—	Upgrade roundcube	Aug 30, 2026	Aug 30, 2026

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CVSS Details

Covered by Rapid7

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