High severity · published Apr 3, 2026
CVE-2026-35545
An issue was discovered in Roundcube Webmail before 1.5.15 and 1.6.15
8.2
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
Webmail · Roundcube
before 1.5.15; 1.6.0 before 1.6.15 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35545
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35545
Patch
https://github.com/roundcube/roundcubemail/commit/7ad62de184368bf42c0f522d1aacc030f5ddcc46
Patch
https://github.com/roundcube/roundcubemail/commit/9d18d524f3cc211003fc99e2e54eed09a2f3da88
Patch
https://github.com/roundcube/roundcubemail/commit/fe1320b199d3a2f58351bb699c9ed4316e73221b
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
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