{"id":"GHSA-x4q5-8j5g-hpjc","summary":"Roundcube Webmail: Insufficient HTML attachment sanitization in preview mode","details":"An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. XSS exists because of insufficient HTML attachment sanitization in preview mode. A victim must preview a text/html attachment.","aliases":["CVE-2026-35539"],"modified":"2026-04-04T07:11:22.048322Z","published":"2026-04-03T06:31:32Z","database_specific":{"github_reviewed":true,"github_reviewed_at":"2026-04-04T06:50:55Z","nvd_published_at":"2026-04-03T05:16:21Z","cwe_ids":["CWE-79"],"severity":"MODERATE"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35539"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/commit/10a6d1fa8acac85c727b0a6ae4a6642bfa27bea1"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/commit/1b30edf5369668c92fe91dae3d52e477c808aa4f"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/commit/d742954ccbcdee7020f8f2e7c49ce0fca5a0efab"},{"type":"PACKAGE","url":"https://github.com/roundcube/roundcubemail"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/releases/tag/1.5.14"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/releases/tag/1.6.14"},{"type":"WEB","url":"https://github.com/roundcube/roundcubemail/releases/tag/1.7-rc5"},{"type":"WEB","url":"https://roundcube.net/news/2026/03/18/security-updates-1.7-rc5-1.6.14-1.5.14"}],"affected":[{"package":{"name":"roundcube/roundcubemail","ecosystem":"Packagist","purl":"pkg:composer/roundcube/roundcubemail"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.7-beta"},{"fixed":"1.7-rc5"}]}],"versions":["1.7-beta","1.7-beta2","1.7-rc","1.7-rc2","1.7-rc3","1.7-rc4"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-x4q5-8j5g-hpjc/GHSA-x4q5-8j5g-hpjc.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"}]}