{"id":"CVE-2026-35544","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.","aliases":["GHSA-xpqh-grpw-4xmg"],"modified":"2026-07-15T02:19:33.586844151Z","published":"2026-04-03T03:59:49.053Z","database_specific":{"cwe_ids":["CWE-669"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/35xxx/CVE-2026-35544.json","cna_assigner":"mitre"},"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"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/roundcube/roundcubemail","events":[{"introduced":"0"},{"last_affected":"c15f5dbf093a497e19a749b20e7f8fb5a9c24cde"},{"introduced":"993b888afe29c383bf45c84f17090f4db96367ba"},{"fixed":"099009b9c8e1d3c636fb9a5af72f7c2596018662"},{"fixed":"226811a1c974271dbedca72672923abaff8191c0"},{"fixed":"57dec0c127b98e0c8e3b9c26c80049b9c4bcaea7"},{"fixed":"d742954ccbcdee7020f8f2e7c49ce0fca5a0efab"},{"fixed":"27ec6cc9cb25e1ef8b4d4ef39ce76d619caa6870"},{"fixed":"8e4a99b0746577c2928f5ae984b3ab533b970ca0"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"1.5.13"},{"introduced":"1.6.0"},{"last_affected":"1.6.13"}],"source":["CPE_RANGE","REFERENCES"],"cpe":"cpe:2.3:a:roundcube:webmail:*:*:*:*:*:*:*:*"}}],"versions":["1.7-rc4","1.5.13","1.6.13","1.7-rc3","1.7-rc2","1.5.12","1.6.12","1.7-rc","1.5.11","1.7-beta2","1.7-beta","1.5.10","1.6.11","1.6.10","1.5.9","1.6.9","1.5.8","1.6.8","1.5.7","1.6.7","1.6.6","1.5.6","1.6.5","1.5.5","1.6.4","1.6.3","1.5.4","1.6.2","1.6.1","1.5.3","1.6.0","1.6-beta","1.5.2","1.5.1","1.5.0","1.5-rc","1.5-beta","1.4-rc2","1.4-rc1","1.4-beta","1.3-beta","1.2-rc","1.2-beta","1.1.0","1.1-rc","1.1-beta","v0.1-beta2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-35544.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"}]}