Bug 2454720 (CVE-2026-35539) - CVE-2026-35539 roundcubemail: Roundcube Webmail: Cross-Site Scripting via HTML attachment preview
Summary: CVE-2026-35539 roundcubemail: Roundcube Webmail: Cross-Site Scripting via HTM...
Keywords:
Status: NEW
Alias: CVE-2026-35539
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2454792 2454793
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-03 05:01 UTC by OSIDB Bzimport
Modified: 2026-04-03 15:16 UTC (History)
0 users

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

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-04-03 05:01:50 UTC 
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insufficient HTML attachment sanitization in preview mode. A victim must preview a text/html attachment.
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