Server-side Request Forgery (SSRF) Affecting roundcube/roundcubemail package, versions <1.6.14>=1.7-beta, <1.7-rc5
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PHP-ROUNDCUBEROUNDCUBEMAIL-15911719
- published6 Apr 2026
- disclosed3 Apr 2026
- creditUnknown
Introduced: 3 Apr 2026
NewCVE-2026-35540 (opens in a new tab)How to fix?
Upgrade roundcube/roundcubemail to version 1.6.14, 1.7-rc5 or higher.
Overview
Affected versions of this package are vulnerable to Server-side Request Forgery (SSRF) in the processing of HTML e-mail messages due to insufficient sanitization of CSS. An attacker can access sensitive information or interact with internal network resources by embedding malicious stylesheet links.