Medium severity · published May 25, 2026
CVE-2026-48846
In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, the remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message, which may…
6.5
CVSS
0.4%
EPSS
No
On KEV
Description
In Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1, the remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message, which 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:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
WE
Webmail · Roundcube
1.6.0 before 1.6.16; 1.7.0 before 1.7.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48846
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48846
github.com
https://github.com/roundcube/roundcubemail/commit/59cca80908a61e662c5f81741449e9aeb91e8abe
github.com
https://github.com/roundcube/roundcubemail/commit/852350486b88b35b8544e8a630fad89e99e2150a
github.com
https://github.com/roundcube/roundcubemail/releases/tag/1.6.16
github.com
https://github.com/roundcube/roundcubemail/releases/tag/1.7.1
roundcube.net
https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1
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