Incorrect Resource Transfer Between Spheres Affecting roundcube/roundcubemail package, versions <1.5.14>=1.6-beta, <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-15911750
- published6 Apr 2026
- disclosed3 Apr 2026
- creditUnknown
Introduced: 3 Apr 2026
NewCVE-2026-35542 (opens in a new tab)How to fix?
Upgrade roundcube/roundcubemail to version 1.5.14, 1.6.14, 1.7-rc5 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Resource Transfer Between Spheres in the processing of HTML email content when handling the background attribute of the BODY element. An attacker can cause information disclosure or bypass access controls by sending a specially crafted email that includes a remote image via the BODY background attribute.