Bug 2454727 (CVE-2026-35540) - CVE-2026-35540 roundcubemail: Roundcube Webmail: SSRF via insufficient CSS sanitization
Summary: CVE-2026-35540 roundcubemail: Roundcube Webmail: SSRF via insufficient CSS sa...
Keywords:
Status: NEW
Alias: CVE-2026-35540
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 05:02 UTC by OSIDB Bzimport
Modified: 2026-04-03 15:16 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-04-03 05:02:21 UTC 
An issue was discovered in Roundcube Webmail 1.6.0 before 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts.
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