CVE-2026-114722
MEDIUM
6,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: none
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: none
Description
AI Translation Available
Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a CSS scoping bypass in HTML messages. rcube_utils::mod_css_styles() did not treat an at-rule prologue such as @layer a; as a selector boundary, and did not handle selectors beginning with ::, so selectors following an at-rule were left unscoped and applied to the whole Roundcube interface instead of being confined to the message body. This allows an HTML message to restyle application chrome for UI redressing and spoofing. Upstream fixed this in the commit “Fix CSS scoping bypass in HTML messages using at-rules”.
669
Incorrect Resource Transfer Between Spheres
DraftCommon Consequences
Security Scopes Affected:
Confidentiality
Integrity
Potential Impacts:
Read Application Data
Modify Application Data
Unexpected State
Applicable Platforms
All platforms may be affected
https://bugs.debian.org/1151279
https://github.com/roundcube/roundcubemail/commit/95b81ae12e2819a9b7e8636b5859b…
https://github.com/roundcube/roundcubemail/commit/ff9cf4a9bf3b7c66db9afe43fe5f1…
https://github.com/roundcube/roundcubemail/releases/tag/1.6.20
https://github.com/roundcube/roundcubemail/releases/tag/1.7.5
https://roundcube.net/news/2026/10/19/security-updates-1.6.20-and-1.7.5