{"id":"CVE-2026-35544","aliases":["GHSA-xpqh-grpw-4xmg"],"url":"https://o3.security/vulnerability/CVE-2026-35544","summary":"Roundcube Webmail: Insufficient CSS sanitization in HTML e-mail messages","details":"An issue was discovered in Roundcube Webmail before 1.5.14 and 1.6.14. Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to a fixed-position mitigation bypass via the use of !important.","published":"2026-04-03T03:59:49.053Z","modified":"2026-09-17T11:45:14.289052455Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"roundcube/roundcubemail","fixedVersion":"1.7-rc5"}],"fix":{"url":"https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662","label":"roundcube/roundcubemail@099009b"},"references":[{"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"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35544.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-35544"},{"type":"FIX","url":"https://github.com/roundcube/roundcubemail/commit/099009b9c8e1d3c636fb9a5af72f7c2596018662"},{"type":"FIX","url":"https://github.com/roundcube/roundcubemail/commit/226811a1c974271dbedca72672923abaff8191c0"},{"type":"FIX","url":"https://github.com/roundcube/roundcubemail/commit/57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7"},{"type":"PACKAGE","url":"https://github.com/roundcube/roundcubemail"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-17T11:45:14.289052455Z"}}