Bug 2454722 (CVE-2026-35543)

Summary: CVE-2026-35543 roundcubemail: Roundcube Webmail: Information disclosure and access-control bypass via animated SVG in email
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Roundcube Webmail. A remote attacker could bypass the remote image blocking feature by sending a specially crafted email that includes Scalable Vector Graphics (SVG) content with animation attributes. This vulnerability may lead to unauthorized information disclosure or an access-control bypass, potentially exposing sensitive user data.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2454783, 2454784    
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Description OSIDB Bzimport 2026-04-03 05:02:01 UTC
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via SVG content (with animate attributes) in an e-mail message. This may lead to information disclosure or access-control bypass.