CVE-2026-35545

low-risk
Published 2026-04-03

An issue was discovered in Roundcube Webmail before 1.5.15 and 1.6.15. The remote image blocking feature can be bypassed via SVG content in an e-mail message. This may lead to information disclosure or access-control bypass. This involves the animate element with attributeName=fill/filter/stroke.

Do I need to act?

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0.04% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.3/10 Medium
NETWORK / LOW complexity

Affected Products (1)

Affected Vendors

Roundcube

References (7)

Patch https://github.com/roundcube/roundcubemail/commit/7ad62de184368bf42c0f522d1aacc0...
Patch https://github.com/roundcube/roundcubemail/commit/9d18d524f3cc211003fc99e2e54eed...
Patch https://github.com/roundcube/roundcubemail/commit/fe1320b199d3a2f58351bb699c9ed4...
Release Notes https://github.com/roundcube/roundcubemail/releases/tag/1.5.15
Release Notes https://github.com/roundcube/roundcubemail/releases/tag/1.6.15
Release Notes https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc6
Vendor Advisory https://roundcube.net/news/2026/03/29/security-updates-1.7-rc6-1.6.15-1.5.15
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal