CVE-2026-48848 Cross-site scripting in Webmail
Insufficient HTML sanitization in Roundcube Webmail allows CSS injection via SVG, potentially enabling XSS attacks and account takeover.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-48848?
CVE-2026-48848 is a high-severity cross-site scripting vulnerability in Roundcube Webmail, published on 25 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7 has insufficient HTML sanitization that could lead to Cascading Style Sheets (CSS) injection via an SVG document that has an animate element with the attributeName attribute.
Weakness: CWE-79
Which versions are affected by CVE-2026-48848?
How do I fix CVE-2026-48848?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-48848 being exploited?
There is no known exploitation of CVE-2026-48848 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-48848, GHSA-p64r-9rcj-x33x, UBUNTU-CVE-2026-48848.