Bug 2522981 - CVE-2026-74998 roundcubemail: information disclosure or XSS via MIME sniffing [fedora-all]
Summary: CVE-2026-74998 roundcubemail: information disclosure or XSS via MIME sniffing...
Keywords:
Status: NEW
Alias: None
Product: Fedora
Classification: Fedora
Component: roundcubemail
Version: rawhide
Hardware: Unspecified
OS: Unspecified
high
high
Target Milestone: ---
Assignee: Remi Collet
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["ff361349-5b2a-4205-8acb-7...
Depends On:
Blocks: CVE-2026-74998
TreeView+ depends on / blocked
 
Reported: 2026-08-24 19:22 UTC by Guilherme de Almeida Suckevicz
Modified: 2026-08-24 19:22 UTC (History)
5 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:

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Description Guilherme de Almeida Suckevicz 2026-08-24 19:22:11 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.
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