Medium severity · published Apr 3, 2026
CVE-2026-35542
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via a crafted background attribute of a BODY element in an e-mail message. This may lead to information disclosure or access-control bypass.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 34% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
Webmail · Roundcube
before 1.5.14; 1.6.0 before 1.6.14 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-35542
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-35542
Patch
https://github.com/roundcube/roundcubemail/commit/e052328e3dc75f13adc2e314eaa4096ac21084ad
Patch
https://github.com/roundcube/roundcubemail/commit/fd0e98178db5c73eaa93d005b561874923f9b0f0
Patch
https://github.com/roundcube/roundcubemail/commit/fde14d01adc9f37893cd82b635883e516ed453f8
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
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