CVE-2026-48846
published 2026-05-25CVE-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…
PriorityP337medium6.5CVSS 3.1
AVNACLPRNUINSUCLILAN
EPSS
0.34%
25.7th percentile
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.
Affected
2 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| roundcube | webmail | >= 1.6.0 < 1.6.16 | 1.6.16 |
| roundcube | webmail | >= 1.7.0 < 1.7.1 | 1.7.1 |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
cvelistv5v3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
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GHSA
GHSA-xx87-33v7-6x23: In Roundcube Webmail 1
ghsa_unreviewed·2026-05-26
CVE-2026-48846 [MEDIUM] CWE-669 GHSA-xx87-33v7-6x23: In Roundcube Webmail 1
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.
CVEList
CVE-2026-48846: In Roundcube Webmail 1
cvelistv5·2026-05-25·CVSS 6.5
CVE-2026-48846 [MEDIUM] CWE-669 CVE-2026-48846: In Roundcube Webmail 1
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.
VulDB
Roundcube Webmail up to 1.6.15/1.7.0 CSS var resource transfer
vuldb·2026-05-25
CVE-2026-48846 [CRITICAL] Roundcube Webmail up to 1.6.15/1.7.0 CSS var resource transfer
A vulnerability identified as critical has been detected in Roundcube Webmail up to 1.6.15/1.7.0. This affects the function var of the component CSS Handler. The manipulation leads to incorrect resource transfer.
This vulnerability is traded as CVE-2026-48846. It is possible to initiate the attack remotely. There is no exploit available.
You should upgrade the affected component.
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2026-48846 roundcubemail: remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message [fedora-all]
bugzilla·2026-05-26·CVSS 6.5
CVE-2026-48846 [MEDIUM] CVE-2026-48846 roundcubemail: remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message [fedora-all]
CVE-2026-48846 roundcubemail: remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message [fedora-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-48846 roundcubemail: remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message [epel-all]
bugzilla·2026-05-26·CVSS 6.5
CVE-2026-48846 [MEDIUM] CVE-2026-48846 roundcubemail: remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message [epel-all]
CVE-2026-48846 roundcubemail: remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message [epel-all]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Bugzilla
CVE-2026-48846 roundcubemail: remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message
bugzilla·2026-05-25·CVSS 6.5
CVE-2026-48846 [MEDIUM] CVE-2026-48846 roundcubemail: remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message
CVE-2026-48846 roundcubemail: remote image blocking feature can be bypassed via a crafted CSS var() value in an e-mail message
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.
https://github.com/roundcube/roundcubemail/commit/59cca80908a61e662c5f81741449e9aeb91e8abehttps://github.com/roundcube/roundcubemail/commit/852350486b88b35b8544e8a630fad89e99e2150ahttps://github.com/roundcube/roundcubemail/releases/tag/1.6.16https://github.com/roundcube/roundcubemail/releases/tag/1.7.1https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1
2026-05-25
Published