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7.2 High

CVE-2026-74998 In Roundcube Webmail before 1.6.18 and 1.7.x before 1.7.3, responses from the CSS (Cascading Style Sheets) proxy were…

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.

Affected products and versions

Product Affected versions Fixed in
Webmail 1.7 1.7.0 → < 1.7.3 1.7.3
Webmail 1.6 1.6.0 → < 1.6.18 1.6.18

Other CVEs of Webmail

The 62 CVEs of Webmail →
CVE-2026-114732 Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an improper authentication vulnerability in… 6.8 Medium CVE-2026-114731 Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by an uncontrolled resource consumption vulnerability… 5.3 Medium CVE-2026-114730 Roundcube Webmail 1.6.14 before 1.6.20 and 1.7.0 before 1.7.5 is affected by a server-side request forgery filter bypass 7.2 High CVE-2026-114729 Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a remote content blocking bypass 5.3 Medium
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