CVE-2026-114722 Roundcube Webmail before 1.6.20 and 1.7.x before 1.7.5 is affected by a CSS scoping bypass in HTML messages.
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-114722?
CVE-2026-114722 is a medium-severity vulnerability in Roundcube Webmail, published on 22 Oct 2026.
Official description
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”.
Weakness: CWE-669
Which versions are affected by CVE-2026-114722?
How do I fix CVE-2026-114722?
Upgrade to a fixed version.
Is CVE-2026-114722 being exploited?
There is no known exploitation of CVE-2026-114722 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-114722, GHSA-jg35-cc9w-63m9, UBUNTU-CVE-2026-114722.