CVE-2026-35543

low-risk
Published 2026-04-03

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.

Do I need to act?

-
0.04% chance of exploitation
EPSS score — low exploit probability
-
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/1a63e01542bff42aaa71c00c4c279a...
Patch https://github.com/roundcube/roundcubemail/commit/39471343ee081ce1d31696c456a2c1...
Patch https://github.com/roundcube/roundcubemail/commit/82ab5eca7b332fce7a174b2b987f09...
Release Notes https://github.com/roundcube/roundcubemail/releases/tag/1.5.14
Release Notes https://github.com/roundcube/roundcubemail/releases/tag/1.6.14
Release Notes https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
Vendor Advisory https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
26
/ 100
low-risk
Severity 21/34 · High
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal