CVE-2026-35542: Roundcube: Bypass of remote image blocking via crafted BODY background attribute
(updated )
An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. The remote image blocking feature can be bypassed via a crafted background attribute of a BODY element in an e-mail message. This may lead to information disclosure or access-control bypass.
References
- github.com/advisories/GHSA-5hf6-crg4-fg59
- github.com/roundcube/roundcubemail
- github.com/roundcube/roundcubemail/commit/e052328e3dc75f13adc2e314eaa4096ac21084ad
- github.com/roundcube/roundcubemail/commit/fd0e98178db5c73eaa93d005b561874923f9b0f0
- github.com/roundcube/roundcubemail/commit/fde14d01adc9f37893cd82b635883e516ed453f8
- github.com/roundcube/roundcubemail/releases/tag/1.5.14
- github.com/roundcube/roundcubemail/releases/tag/1.6.14
- github.com/roundcube/roundcubemail/releases/tag/1.7-rc5
- nvd.nist.gov/vuln/detail/CVE-2026-35542
- roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14
Code Behaviors & Features
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