CVE-2026-48846

EUVD-2026-31725
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
mitreCNA
6.5 MEDIUM
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: 25%
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
roundcubewebmail
1.6.0 ≤
𝑥
< 1.6.16
CNA
roundcubewebmail
1.7.0 ≤
𝑥
< 1.7.1
CNA
Debian logo
Debian Releases
Debian Product
Codename
roundcube
bookworm
vulnerable
bookworm (security)
1.6.5+dfsg-1+deb12u9
fixed
bullseye
vulnerable
bullseye (security)
1.4.15+dfsg.1-1+deb11u9
fixed
forky
1.6.17+dfsg-1
fixed
sid
1.6.17+dfsg-1
fixed
trixie
vulnerable
trixie (security)
1.6.16+dfsg-0+deb13u1
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
roundcube
bionic
needs-triage
focal
needs-triage
jammy
needs-triage
noble
needs-triage
questing
needs-triage
resolute
needs-triage
Common Weakness Enumeration
References
https://github.com/roundcube/roundcubemail/commit/59cca80908a61e662c5f81741449e9aeb91e8abe
https://github.com/roundcube/roundcubemail/commit/852350486b88b35b8544e8a630fad89e99e2150a
https://github.com/roundcube/roundcubemail/releases/tag/1.6.16
https://github.com/roundcube/roundcubemail/releases/tag/1.7.1
https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1