{"id":"GHSA-5hf6-crg4-fg59","aliases":["CVE-2026-35542"],"title":"Roundcube: Bypass of remote image blocking via crafted BODY background attribute","description":"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bypass.","severity":"medium","score":5.3,"published":"2026-04-03T06:31:32.000Z","modified":"2026-04-04T07:11:22.552Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"roundcube/roundcubemail","ranges":[{"events":[{"introduced":"1.7-beta"},{"fixed":"1.7-rc5"}],"type":"ECOSYSTEM"}],"versions":["1.7-beta","1.7-beta2","1.7-rc","1.7-rc2","1.7-rc3","1.7-rc4"],"fixed":["1.7-rc5"]}],"references":["https://nvd.nist.gov/vuln/detail/CVE-2026-35542","https://github.com/roundcube/roundcubemail/commit/e052328e3dc75f13adc2e314eaa4096ac21084ad","https://github.com/roundcube/roundcubemail/commit/fd0e98178db5c73eaa93d005b561874923f9b0f0","https://github.com/roundcube/roundcubemail/commit/fde14d01adc9f37893cd82b635883e516ed453f8","https://github.com/roundcube/roundcubemail","https://github.com/roundcube/roundcubemail/releases/tag/1.5.14","https://github.com/roundcube/roundcubemail/releases/tag/1.6.14","https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5","https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14"],"sources":[{"name":"OSV","id":"GHSA-5hf6-crg4-fg59","modified":"2026-04-04T07:11:22.552794Z","url":"https://osv.dev/vulnerability/GHSA-5hf6-crg4-fg59"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3}]}