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”.
References
Configurations
No configuration.
History
22 Oct 2026, 02:17
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2026-10-22 02:17
Updated : 2026-10-28 03:17
NVD link : CVE-2026-114722
Mitre link : CVE-2026-114722
CVE.ORG link : CVE-2026-114722
JSON object : View
Products Affected
No product.
CWE
CWE-669
Incorrect Resource Transfer Between Spheres
