CVE-2026-48848

Severity: high (CVSS 7.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-25 · updated 2026-07-24
Weakness: CWE-79

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.

Affected products

Roundcube Webmail: from 1.6.0 before 1.6.16; from 1.7.0 before 1.7.1 — fixed in 1.6.16, 1.7.1

How to fix

Upgrade to a fixed version: Roundcube Webmail 1.6.16, 1.7.1. Check the vendor advisory for mitigations.

References

https://github.com/roundcube/roundcubemail/commit/58e5263f341e6a418774fb6d2643669a3c4d8a27
https://github.com/roundcube/roundcubemail/commit/c960d102472dc579e15907d5bcdc3103a090ccf9
https://github.com/roundcube/roundcubemail/releases/tag/1.6.16
https://github.com/roundcube/roundcubemail/releases/tag/1.7.1
https://roundcube.net/news/2026/05/24/security-updates-1.6.16-and-1.7.1

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