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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Roundcube Webmail
Default version status: unaffected
1.6.0 to < 1.6.16affected1.7.0 to < 1.7.1affected
References
- https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1 ↗
- https://github.com/roundcube/roundcubemail/releases/tag/1.7.1 ↗
- https://github.com/roundcube/roundcubemail/commit/59cca80908a61e662c5f81741449e9aeb91e8abe ↗
- https://github.com/roundcube/roundcubemail/releases/tag/1.6.16 ↗
- https://github.com/roundcube/roundcubemail/commit/852350486b88b35b8544e8a630fad89e99e2150a ↗